CN103716075A - Method and apparatus for joint channel calibration among multiple radio remote units - Google Patents

Abstract

The present invention obtains a first self-calibration coefficient and a second self-calibration coefficient by respectively self-calibrating a radio remote unit 0 (RRU0) and a radio remote unit 1 (RRU1), then obtains a first compensation coefficient and a second compensation coefficient by transmitting and receiving calibration signals to each other through any one antenna of the RRU0 and any one antenna of the RRU1, and respectively obtains a first calibration coefficient and a second calibration coefficient according to the first self-calibration coefficient, the second self-calibration coefficient, the first compensation coefficient and the second compensation coefficient, and respectively compensates the channels of the RRU0 and the RRU 1, thus implementing the joint channel calibration among multiple RRUs.

Description

The method and apparatus that between a kind of a plurality of Remote Radio Unit, joint channel is proofreaied and correct

Technical field

The present invention relates to the communications field, and more specifically, relate to the method and apparatus that between a kind of a plurality of RRU, joint channel is proofreaied and correct.

Background technology

At time division duplex (Time Division Duplex, TDD) in system, base station is by detecting subscriber equipment (User Equipment, UE) detection reference signal (the Sounding Reference Signal sending, SRS) signal, up channel is estimated, and utilized the reciprocity of TDD system up-downgoing, using the up channel estimating as down channel, carry out wave beam forming.Although TDD system in theory, up-downgoing is reciprocity, and in real system, up-downgoing channel response has been introduced respectively the different middle radio-frequency receiving-transmitting channel response in base station.By theory analysis, find, if a channel response of any two middle radio-frequency channels is different from the ratio of receiving channel response, will affect the effect of coherent transmitting.This just need to compensate radio-frequency receiving-transmitting passage in each, is called channel correcting.The channel correcting of single subdistrict has maturation method at present.

Cooperative multipoint transmission (Coordinated Multi-Point, CoMP) be Long Term Evolution (Long Term Evolution, LTE) system key characteristic, utilize CoMP technology can effectively resist the interference problem of LTE cell edge, base station side in LTE system can comprise Base Band Unit (Base Band Unit, BBU), each BBU can connect a plurality of Remote Radio Unit (Radio Remote Unit, RRU).Combine transmission (Joint Transmission, JT) technology a kind of as CoMP technology, can significantly improve cell edge and on average handle up.For in TDD system, realize the gain that JT technology is brought, need to carry out channel correcting equally.Yu Dan community wave beam forming technology is different, and the ratio of the up-downgoing radio-frequency channel response that each antenna of a plurality of communities of JT Technology Need is corresponding is identical.Even if channel correcting has been carried out respectively in each community, if do not carry out the correction of minizone, JT technology still can not arrive the performance of expectation.In the situation that single RRU covers respective cell, to the channel correcting technology of single RRU comparative maturity, but to the correction of combining between a plurality of RRU passages, remain a difficult problem for industry.

Summary of the invention

The invention provides the method and apparatus that between a kind of a plurality of RRU, joint channel is proofreaied and correct, for the joint channel between a plurality of RRU of communication system, proofread and correct.

First aspect, a kind of method that between a plurality of RRU, joint channel is proofreaied and correct is provided, for the joint channel between a plurality of RRU of communication system, proofread and correct, in described communication system, at least comprise a RRU and the 2nd RRU, the method comprises carries out respectively self-correcting to a described RRU and described the 2nd RRU, and obtains respectively the first self-correcting coefficient and the second self-correcting coefficient; By second antenna transmission the first correction signal in the 2nd RRU described in the first day alignment in a described RRU, the first correction signal described in described the second antenna reception, obtains the second penalty coefficient; By first antenna transmission the second correction signal described in described second day alignment, the second correction signal described in described the first antenna reception, obtains the first penalty coefficient; According to described the first penalty coefficient and the first self-correcting coefficient, obtain the first correction coefficient, according to described the second penalty coefficient and the second self-correcting coefficient, obtain the second correction coefficient.

In the possible implementation of the first, in conjunction with first aspect, after described method, also comprise the steps:, according to described the first correction coefficient, a described RRU is carried out to channel compensation, according to described the second correction coefficient, described the 2nd RRU is carried out to channel compensation.

In the possible implementation of the second, in conjunction with first aspect, described the first self-correcting coefficient comprises that first receives self-correcting coefficient from correction coefficient and first, and the second self-correcting coefficient comprises that second receives self-correcting coefficient from correction coefficient and second; The first correction coefficient comprises first correction coefficient and the first receipts correction coefficient, and the second correction coefficient comprises second correction coefficient and the second receipts correction coefficient.

In the third possible implementation, in conjunction with first aspect, described the first antenna and described the second antenna are respectively any one antenna in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively an antenna that reaches received signal strength in a described RRU and described the 2nd RRU or signal quality thresholding; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, select to reach a pair of antenna of received signal strength or signal quality thresholding; Described mode of carrying out the adjustment of aerial radiation direction comprises following any one mode or its combination in any: numerical weighted, intermediate frequency weighting, radio frequency phase shift, physics move.

In the 4th kind of possible implementation, in conjunction with the possible implementation of the second of first aspect, described the first correction signal is calibration reference sequence and the described first product from correction coefficient; Described the second correction signal is described calibration reference sequence and the described second product from correction coefficient;

In the 5th kind of possible implementation, in conjunction with the possible implementation of the second of first aspect, described the first correction signal is calibration reference sequence, described in obtain the second penalty coefficient before, also comprise the steps: from correction coefficient, to send to described the 2nd RRU by described first; Described obtain the first penalty coefficient before, also comprise the steps: from correction coefficient, to send to a described RRU by described second.

In the 6th kind of possible implementation, in conjunction with the 4th kind, the 5th kind possible implementation of first aspect, described calibration reference sequence comprises training sequence or the reference signal sequence using in Long Term Evolution LTE system and worldwide interoperability for microwave access WiMAX system.

In the 7th kind of possible implementation, in conjunction with the second of first aspect, the 6th kind of possible implementation, describedly according to described the first penalty coefficient and the first self-correcting coefficient, obtain the first correction coefficient, be specially: using described the first penalty coefficient and the described first product from correction coefficient as first correction coefficient; Or using the described first ratio of receiving self-correcting coefficient and described the first penalty coefficient as the first receipts correction coefficient; Or using the ratio of described the first transmit-receive combination self-correcting coefficient and described the first penalty coefficient as the first transmit-receive combination correction coefficient; Describedly according to described the second penalty coefficient and the second self-correcting coefficient, obtain the second correction coefficient, be specially: using described the second penalty coefficient and the described second product from correction coefficient as second correction coefficient; Or using the described second ratio of receiving self-correcting coefficient and described the first penalty coefficient as the second receipts correction coefficient; Or using the ratio of described the second transmit-receive combination self-correcting coefficient and described the first penalty coefficient as the second transmit-receive combination correction coefficient.

In the 8th kind of possible implementation, in conjunction with the second of first aspect, the 6th kind of possible implementation, described second penalty coefficient that obtains, be specially: the first correction signal described in described the second antenna reception, obtain second channel response, and using the receipts self-correcting coefficient of described second channel response and service channel corresponding to described the second antenna as the second penalty coefficient; Described first penalty coefficient that obtains, is specially: the second correction signal described in described the first antenna reception, obtain the first channel response, and using the receipts self-correcting coefficient of described the first channel response and service channel corresponding to described the first antenna as the first penalty coefficient.

In the 9th kind of possible implementation, in conjunction with the second of first aspect, the 6th kind of possible implementation, in described communication system, also comprise the 3rd RRU, described a described RRU and described the 2nd RRU are carried out respectively to self-correcting, and before or after obtaining respectively the first self-correcting coefficient and the second self-correcting coefficient also comprise the steps: described the 3rd RRU to carry out self-correcting, and obtaining the 3rd self-correcting coefficient, described the 3rd self-correcting coefficient comprises that the 3rd receives self-correcting coefficient from correction coefficient and the 3rd; Described obtain the first penalty coefficient after, also comprise the steps: described the first penalty coefficient to send to described the 3rd RRU, and obtain the 3rd correction coefficient according to described the first penalty coefficient and the 3rd self-correcting coefficient.

Second aspect, the invention provides a kind of means for correcting, for the joint channel between a plurality of RRU of communication system, proofread and correct, in described communication system, at least comprise a RRU and the 2nd RRU, it is characterized in that, described means for correcting comprises: self-tuner, for a described RRU and described the 2nd RRU are carried out respectively to self-correcting, and obtains respectively the first self-correcting coefficient and the second self-correcting coefficient; The first controller, for second antenna transmission the first correction signal in the 2nd RRU described in the first day alignment by a described RRU, the first correction signal described in described the second antenna reception; Second controller, by first antenna transmission the second correction signal described in described second day alignment, the second correction signal described in described the first antenna reception, obtains the first penalty coefficient; Processor, for after the first correction signal described in described the second antenna reception, obtains the second penalty coefficient; After the second correction signal described in described the first antenna reception, obtain the first penalty coefficient; And obtain the first correction coefficient according to described the first penalty coefficient and the first self-correcting coefficient, according to described the second penalty coefficient and the second self-correcting coefficient, obtain the second correction coefficient;

In the possible implementation of the first, in conjunction with second aspect, described the first self-correcting coefficient comprises that first receives self-correcting coefficient from correction coefficient and first, and the second self-correcting coefficient comprises that second receives self-correcting coefficient from correction coefficient and second; The first correction coefficient comprises first correction coefficient and the first receipts correction coefficient, and the second correction coefficient comprises second correction coefficient and the second receipts correction coefficient.

In the possible implementation of the second, in conjunction with second aspect, described means for correcting also comprises compensator, and described compensator, for a described RRU being carried out to channel compensation according to described the first correction coefficient, carries out channel compensation according to described the second correction coefficient to described the 2nd RRU.

In the third possible implementation, in conjunction with second aspect, described the first antenna and described the second antenna are respectively any one antenna in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively an antenna that reaches received signal strength in a described RRU and described the 2nd RRU or signal quality thresholding; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, select to reach a pair of antenna of received signal strength or signal quality thresholding; Described mode of carrying out the adjustment of aerial radiation direction comprises following any one mode or its combination in any: numerical weighted, intermediate frequency weighting, radio frequency phase shift, physics move.

In the 4th kind of possible implementation, in conjunction with the possible implementation of the first of second aspect, described means for correcting also comprises the first transmitter, and described transmitter, for before obtaining the second penalty coefficient, sends to described the 2nd RRU by described first from correction coefficient; Before obtaining the first penalty coefficient, by described second, from correction coefficient, send to a described RRU.

In the 5th kind of possible implementation, in conjunction with second aspect, described self-tuner also carries out self-correcting for the 3rd RRU that described communication system is comprised, and obtains the 3rd self-correcting coefficient; Described means for correcting also comprises the second transmitter, and described the second transmitter, for after obtaining the first penalty coefficient, sends to described the 3rd RRU by described the first penalty coefficient; Described processor is also for obtaining the 3rd correction coefficient according to described the first penalty coefficient and the 3rd self-correcting coefficient.

The present invention is by carrying out respectively self-correcting to a RRU and the 2nd RRU, obtain the first self-correcting coefficient and the second self-correcting coefficient, then by any one antenna in any one antenna in a RRU and the 2nd RRU, mutually transmit and receive correction signal, obtain the first penalty coefficient and the second penalty coefficient, and according to described the first self-correcting coefficient, the second self-correcting coefficient and the first penalty coefficient, the second penalty coefficient obtains the first correction coefficient and the second correction coefficient, respectively a RRU and a RRU are carried out to channel compensation, the joint channel that completes a plurality of RRU is proofreaied and correct.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skills, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.

The outer correction schematic diagram that between 2 RRU that Fig. 1 provides for the embodiment of the present invention, joint channel is proofreaied and correct;

The interior correction schematic diagram that between 2 RRU that Fig. 2 provides for the embodiment of the present invention, joint channel is proofreaied and correct;

The schematic flow sheet that between a kind of 2 RRU that Fig. 3 provides for the embodiment of the present invention, joint channel is proofreaied and correct;

Between a kind of 2 RRU that Fig. 4 provides for the embodiment of the present invention, joint channel timing is for launching the sky line options schematic diagram that receives correction signal;

The schematic flow sheet that between 2 RRU of another kind that Fig. 5 provides for the embodiment of the present invention, joint channel is proofreaied and correct;

The schematic diagram that between 3 RRU that Fig. 6 provides for the embodiment of the present invention, joint channel is proofreaied and correct;

The schematic flow sheet that between a kind of 3 RRU that Fig. 7 provides for the embodiment of the present invention, joint channel is proofreaied and correct;

The schematic diagram that between k the RRU that Fig. 8 provides for the embodiment of the present invention, joint channel is proofreaied and correct;

The schematic flow sheet that between a kind of k the RRU that Fig. 9 provides for the embodiment of the present invention, joint channel is proofreaied and correct;

The schematic flow sheet that between 3 RRU of another kind that Figure 10 provides for the embodiment of the present invention, joint channel is proofreaied and correct;

The structural representation of a kind of means for correcting that Figure 11 provides for the embodiment of the present invention;

The schematic flow sheet that between 2 RRU of another kind that Figure 12 provides for the embodiment of the present invention, joint channel is proofreaied and correct;

The structural representation of the another kind of means for correcting that Figure 13 provides for the embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

In the present embodiment, RRU comprises a plurality of middle radio-frequency channels, also referred to as service channel, service channel and antenna are corresponding one by one, and each service channel comprises that a middle radio frequency is received passage and a middle radio frequency is sent out passage, and the business that is defined as respectively receives passage and business is sent out passage, except service channel, RRU also comprises that at least one correction channel is to carry out channel correcting, and wherein correction channel comprises that a middle radio frequency is received passage and a middle radio frequency is sent out passage, is defined as respectively to proofread and correct receive passage and proofread and correct and send out passage.In practical application, correction channel and service channel can share radio-frequency channel in or part, and can utilize corresponding business antenna transmission correction signal.Coupling circuit in system and antenna can integrate, and for example coupling circuit can be for being integrated in the coupling module in antenna, and coupling circuit also can be integrated in RRU inside simultaneously.

Embodiment mono-:

Embodiment mono-is with channel correcting between two RRU, each RRU comprises that again 4 antennas (actual antennas number can be arbitrary integer) describe for example, in embodiment, with i, represent the antenna of RRU, i=0,1,2,3, as depicted in figs. 1 and 2, Fig. 1 is outer correction type, Fig. 2 is interior correction type, all applicable the present embodiment.Outer correction represents that coupling circuit is not integrated in RRU inside; Interior correction represents that coupling circuit is integrated in RRU inside.In Fig. 1 and Fig. 2, TRX represents business transceiver channel.

The method flow schematic diagram that between a kind of a plurality of RRU that Fig. 3 provides for embodiment mono-, joint channel is proofreaied and correct, as shown in Figure 3, the method comprises:

S301:RRU0 and RRU1 carry out respectively self-correcting;

In the present embodiment, RRU0 and RRU1 are respectively a RRU and the 2nd RRU.It is prior art that single RRU carries out inside self-tuning method, and the present embodiment repeats no more.After RRU0 and RRU1 self-correcting complete, obtain separately its self-correcting coefficient, self-correcting coefficient comprises that again business is sent out passage self-correcting coefficient (referred to as from correction coefficient) and business is received passage self-correcting coefficient (referred to as receiving self-correcting coefficient).Utilize and receive self-correcting coefficient and respectively uplink receiving and downlink compensated from correction coefficient, just can meet the requirement of TDD system to single RRU up-downgoing reciprocity.

Wherein receive self-correcting coefficient

can be expressed as:

${\mathrm{\β}}_{k,i}^{\mathrm{UL}}\left(n\right)=\frac{1}{h_k^{\mathrm{ct}}\left(n\right)h_{k,i}^r\left(n\right)},k=\mathrm{0,1}$

Receipts self-correcting coefficient during k=0 is:

Receipts self-correcting coefficient during k=1 is:

Wherein, k represents k RRU, and in the present embodiment, k represents RRU0 at 0 o'clock, and k represents RRU1 at 1 o'clock; N represents n subcarrier, n=0, and 1 ..., N-1, N represents subcarrier number; I represents i business receipts passage,

the channel response of passage on n subcarrier sent out in the correction that represents k RRU;

i the business that represents k RRU received the channel response of passage on n subcarrier.

From correction coefficient, can be expressed as:

During k=0, from correction coefficient, be:

During k=1, from correction coefficient, be:

Wherein, k represents k RRU, and in the present embodiment, k represents RRU0 at 0 o'clock, and k represents RRU1 at 1 o'clock; N represents n subcarrier, n=0, and 1 ..., N-1; I represents that i is sent out passage,

the channel response of passage on n subcarrier received in the correction that represents k RRU;

i the business that represents k RRU send out passage on n subcarrier channel response.

RRU0 completes after self-correcting and can represent with formula below:

$\frac{{\mathrm{\β}}_{\mathrm{0,0}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,0}}^r\left(n\right)}{{\mathrm{\β}}_{\mathrm{0,0}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right)}=\frac{{\mathrm{\β}}_{\mathrm{0,1}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,1}}^r\left(n\right)}{{\mathrm{\β}}_{\mathrm{0,1}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,1}}^t\left(n\right)}=...=\frac{{\mathrm{\β}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\mathrm{\β}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^t\left(n\right)}=\frac{h_0^{\mathrm{cr}}\left(n\right)}{h_0^{\mathrm{ct}}\left(n\right)}$

RRU1 completes after self-correcting and can represent with formula below:

$\frac{{\mathrm{\β}}_{\mathrm{1,0}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{1,0}}^r\left(n\right)}{{\mathrm{\β}}_{\mathrm{1,0}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{1,0}}^t\left(n\right)}=\frac{{\mathrm{\β}}_{\mathrm{1,1}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{1,1}}^r\left(n\right)}{{\mathrm{\β}}_{\mathrm{1,1}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{1,1}}^t\left(n\right)}=...=\frac{{\mathrm{\β}}_{1,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right)h_{1,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\mathrm{\β}}_{1,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right)h_{1,N_{\mathrm{ANT}}-1}^t\left(n\right)}=\frac{h_1^{\mathrm{cr}}\left(n\right)}{h_1^{\mathrm{ct}}\left(n\right)}$

At above-mentioned RRU0 and RRU1, complete in the formula after self-correcting N _aNTthe antenna number that represents RRU.In addition, this formula be take RRU0 and RRU1 has same antenna number to be described as example, and the method is equally applicable to the RRU of any antenna number.

Optionally, transmit-receive combination self-correcting coefficient table is shown and receives self-correcting coefficient and from the ratio of correction coefficient:

${\widetilde{\mathrm{\β}}}_{k,i}\left(n\right)=\frac{{\mathrm{\β}}_{k,i}^{\mathrm{UL}}\left(n\right)}{{\mathrm{\β}}_{k,i}^{\mathrm{DL}}\left(n\right)}$

Use transmit-receive combination self-correcting coefficient, RRU0 completes after self-correcting and can represent with formula below:

$\frac{{\widetilde{\mathrm{\β}}}_{\mathrm{0,0}}\left(n\right)h_{\mathrm{0,0}}^r\left(n\right)}{h_{\mathrm{0,0}}^t\left(n\right)}=\frac{{\widetilde{\mathrm{\β}}}_{\mathrm{0,1}}\left(n\right)h_{\mathrm{0,1}}^r\left(n\right)}{h_{\mathrm{0,1}}^t\left(n\right)}=...=\frac{{\widetilde{\mathrm{\β}}}_{0,N_{\mathrm{ANT}}-1}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^r\left(n\right)}{h_{0,N_{\mathrm{ANT}}-1}^t\left(n\right)}=\frac{h_0^{\mathrm{cr}}\left(n\right)}{h_0^{\mathrm{ct}}\left(n\right)}$

Use transmit-receive combination self-correcting coefficient, RRU1 completes after self-correcting and can represent with formula below:

$\frac{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{1,0}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)}=\frac{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{1,1}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}^r\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}^t\left(n\right)}=...=\frac{{\widetilde{\mathrm{\&beta;}}}_{1,N_{\mathrm{ANT}}-1}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^t\left(n\right)}=\frac{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}$

Can find out, RRU0 and RRU1 complete after self-correcting separately, first receives self-correcting coefficient from correction coefficient and first makes each passage up-downgoing ratio of RRU0 inside identical, and second receives self-correcting coefficient from correction coefficient and second makes each passage up-downgoing ratio of RRU0 inside identical.But RRU0 is different from the ratio of RRU1 up-downgoing.

S302: by first antenna transmission the first correction signal in RRU0, the first correction signal described in the second antenna reception in RRU1; By second antenna transmission the second correction signal in RRU1, the second correction signal described in the first antenna reception in RRU0;

An antenna of any selection of difference in RRU0 and RRU1, as previously mentioned, the corresponding antenna of each service channel in RRU, so in the present embodiment, selection antenna is identical with any selection service channel implication arbitrarily.In RRU0 and RRU1, select arbitrarily respectively an antenna, for example RRU0 selects its 0th antenna that service channel TRX0 is corresponding 0, and RRU1 also selects its 0th antenna that service channel TRX0 is corresponding 0, in the present embodiment, antenna 0 in RRU0 is the first antenna, and the antenna 0 in RRU1 is the second antenna.

Optionally, when selecting antenna, can be in RRU selective reception signal strength signal intensity or the best antenna of signal quality, at least one mode in simultaneously can also moving based on numerical weighted, intermediate frequency weighting, radio frequency phase shift or physics is carried out the adjustment of aerial radiation direction, reaches received signal strength or signal quality while communicating by letter between satisfactory RRU.The information such as received signal strength or signal quality indication can complete alternately by X2 interface or privately owned communication interface.For example, in Fig. 4:

0 transmitting of RRU0 antenna, RRU1 antenna 0 receives, and signal strength signal intensity or signal quality are designated as x00;

1 transmitting of RRU0 antenna, RRU1 antenna 0 receives, and signal strength signal intensity or signal quality are designated as x01;

0 transmitting of RRU0 antenna, RRU1 antenna 1 receives, and signal strength signal intensity or signal quality are designated as x10;

1 transmitting of RRU0 antenna, RRU1 antenna 1 receives, and signal strength signal intensity or signal quality are designated as x11;

RRU0 transmitting antenna can pass through frame number, the information implicit expression such as difference transmits indication, the base band that RRU1 is corresponding completes the right selection of optimal antenna according to x00, x01, x10, x11, as transmitting and the use of reception signal between joint channel timing RRU between RRU, choose after antenna, for example each RRU has selected antenna 0:

1) make RRU0 pass through antenna 0 transmitting the first correction signal, make RRU1 pass through antenna 0 and receive described the first correction signal, described the first correction signal is: choose specific calibration reference sequence, as LTE and worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, WiMAX) the various training sequences or the reference signal sequence that in system, adopt, be designated as reference sequences S, using described calibration reference sequence and first after correction coefficient multiplies each other as the first correction signal.

Optionally, at RRU0 during by antenna 0 transmitting the first correction signal, close in RRU0 other passages except a passage of the service channel 0 of antenna 0 correspondence, to avoid interference.

The first correction signal of the n of the antenna 0 of a RRU0 carrier transmit is:

${\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{DL}}\left(n\right)s\left(n\right),n=\mathrm{0,1},...,N-1$

The first correction signal that n subcarrier of the antenna 0 of RRU1 receives is:

${\tilde{r}}_{\mathrm{1,0}}\left(n\right)={\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air}}\left(n\right)\&CenterDot;h_{0,0}^t\left(n\right)\&CenterDot;{\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{DL}}\left(n\right)\&CenterDot;s\left(n\right),n=\mathrm{0,1},...,N-1$

Wherein, h _air(n) be the channel response of eating dishes without rice or wine, for TDD system, the channel response of eating dishes without rice or wine of uplink and downlink equates, thereby do not identify descending (Downlink, DL) or up (Uplink, UL).

RRU1 receives after the first correction signal, by reference sequences S, carries out channel estimating, according in step S301

the second channel response that the individual sub-carrier estimation of n goes out is:

${\mathrm{\&gamma;}}_{\mathrm{1,0}}\left(n\right)=\frac{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air}}\left(n\right)}{h_0^{\mathrm{cr}}\left(n\right)},n=\mathrm{0,1},...,N-1$

Optionally, RRU1 receives after correction signal, does not carry out channel estimating, and the response of the second channel of n subcarrier is:

${\mathrm{\&gamma;}}_{\mathrm{1,0}}\left(n\right)={\tilde{r}}_{\mathrm{1,0}}\left(n\right)=\frac{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air}}\left(n\right)}{h_0^{\mathrm{cr}}\left(n\right)}\&CenterDot;s\left(n\right),n=\mathrm{0,1},...,N-1$

2) make RRU1 pass through antenna 0 transmitting the second correction signal, make RRU0 pass through antenna 0 and receive described the second correction signal; Described the second correction signal is: by described calibration reference sequence, described reference sequences S for example, with second after correction coefficient multiplies each other as the second correction signal.

Optionally, at RRU1 during by antenna 0 transmitting the second correction signal, close in RRU1 other passages except a passage of the service channel 0 of antenna 0 correspondence, to avoid interference.

The second correction signal of the n of the antenna 0 of a RRU1 carrier transmit is:

${\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{DL}}\left(n\right)s\left(n\right),n=\mathrm{0,1},...,N-1,$

The second correction signal that n subcarrier of the antenna 0 of RRU0 receives is:

${\tilde{r}}_{\mathrm{0,0}}\left(n\right)=h_{\mathrm{0,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air}}\left(n\right)\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)\&CenterDot;{\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{DL}}\left(n\right)\&CenterDot;s\left(n\right),n=\mathrm{0,1},...,N-1,$

RRU0 receives after correction signal, by reference sequences S, carries out channel estimating, and the first channel response that the individual sub-carrier estimation of n goes out is:

${\mathrm{\&gamma;}}_{\mathrm{0,0}}\left(n\right)=\frac{h_{\mathrm{0,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)},n=\mathrm{0,1},...,N-1,$

Optionally, RRU0 receives after correction signal, does not carry out channel estimating, and the first channel response of n subcarrier is:

${\mathrm{\&gamma;}}_{\mathrm{0,0}}\left(n\right)={\tilde{r}}_{\mathrm{0,0}}\left(n\right)=\frac{h_{\mathrm{0,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}\&CenterDot;s\left(n\right),n=\mathrm{0,1},...,N-1,$

S303: obtain the first penalty coefficient and the second penalty coefficient according to described the first channel response and second channel response.Penalty coefficient obtains correction coefficient after being used for revising self-correcting coefficient, makes the ratio of different RRUs up-downgoing identical;

Therefore in the present embodiment, RRU1 has selected the antenna 0 of service channel 0 correspondence as the second antenna, according to the receipts self-correcting coefficient of the service channel 0 drawing during RRU1 self-correcting in step 301

n=0,1...., N-1, by γ _1,0(n) with

product as the second penalty coefficient μ ₁(n):

${\mathrm{\&mu;}}_1\left(n\right)=\frac{h_{\mathrm{Air}}\left(n\right)}{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)},n=\mathrm{0,1},...,N-1$

Optionally, when RRU1 receives after correction signal, while not carrying out channel estimating:

${\mathrm{\&mu;}}_1\left(n\right)=\frac{h_{\mathrm{Air}}\left(n\right)}{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}\&CenterDot;s\left(n\right),n=\mathrm{0,1},...,N-1$

Therefore in the present embodiment, RRU0 has selected the antenna 0 of service channel 0 correspondence as the first antenna, according to the receipts correction coefficient of the service channel 0 drawing during RRU0 self-correcting in step 301 n=0,1...., N-1, by γ _0,0(n) with

product as the first penalty coefficient μ ₀(n):

${\mathrm{\&mu;}}_0\left(n\right)={\mathrm{\&gamma;}}_{\mathrm{0,0}}\left(n\right){\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{UL}}\left(n\right)=\frac{h_{\mathrm{Air}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_0^{\mathrm{ct}}\left(n\right)},n=\mathrm{0,1},...,N-1$

Optionally, when RRU0 receives after correction signal, while not carrying out channel estimating:

${\mathrm{\&mu;}}_0\left(n\right)=\frac{h_{\mathrm{Air}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_0^{\mathrm{ct}}\left(n\right)}\&CenterDot;s\left(n\right),n=\mathrm{0,1},...,N-1$

It should be noted that, in the present embodiment, both can between RRU, first complete transmitting and receiving of correction signal, calculate again penalty coefficient, also can first to RRU1, launch the first correction signal by RRU0, RRU1 calculates the second penalty coefficient after receiving described the first correction signal, and then RRU1 launches the second correction signal to RRU0, and RRU0 calculates the first penalty coefficient after receiving described the second correction signal.

S304: obtain the first correction coefficient according to the first penalty coefficient and the first self-correcting coefficient, obtain the second correction coefficient according to the second penalty coefficient and the second self-correcting coefficient, and respectively RRU0 and RRU1 are carried out to channel compensation.

Be specially: by the first penalty coefficient μ ₀(n) and the first product from correction coefficient is as first correction coefficient

by the second penalty coefficient μ ₁(n) and the second product from correction coefficient is as second correction coefficient that is:

${\widetilde{\mathrm{\&beta;}}}_{0,i}^{\mathrm{DL}}\left(n\right)={\mathrm{\&mu;}}_0\left(n\right){\mathrm{\&beta;}}_{0,i}^{\mathrm{DL}}\left(n\right)$

${\widetilde{\mathrm{\&beta;}}}_{1,i}^{\mathrm{DL}}\left(n\right)={\mathrm{\&mu;}}_1\left(n\right){\mathrm{\&beta;}}_{1,i}^{\mathrm{DL}}\left(n\right)$

According to described first correction coefficient, RRU0 is sent out to channel compensation, the ratio of the transceiver channel of the RRU0 after compensation is:

$\frac{{\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,0}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{0,0}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{0,1}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,1}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{0,1}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,1}}^t\left(n\right)}=...=\frac{{\mathrm{\&beta;}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^t\left(n\right)}$

$=\frac{\frac{1}{h_0^{\mathrm{ct}}\left(n\right)}}{\frac{h_{\mathrm{Air}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_0^{\mathrm{ct}}\left(n\right)}\frac{1}{h_0^{\mathrm{cr}}\left(n\right)}}=\frac{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}{h_{\mathrm{Air}}\left(n\right)}$

In S302, RRU0 receives after correction signal, does not carry out channel estimating, and the ratio of the transceiver channel of the RRU0 after compensation is:

$\frac{{\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,0}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{0,0}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{0,1}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,1}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{0,1}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,1}}^t\left(n\right)}=...=\frac{{\mathrm{\&beta;}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^t\left(n\right)}$

$=\frac{h_0^{\mathrm{cr}}\left(n\right)}{\frac{h_{\mathrm{Air}}\left(n\right)\&CenterDot;s\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_0^{\mathrm{ct}}\left(n\right)}{h}_0^{\mathrm{ct}}\left(n\right)}=\frac{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}{h_{\mathrm{Air}}\left(n\right)\&CenterDot;s\left(n\right)}$

The difference of the ratio formula of above-mentioned two transceiver channels is, in S302, RRU0 receives after correction signal, while not carrying out channel estimating, and many s (n).

From correction coefficient, RRU1 is sent out to channel compensation according to described second, the ratio of the transceiver channel of the RRU1 after compensation is:

$\frac{{\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{1,0}}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{1,1}}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{1,1}}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}^t\left(n\right)}=...=\frac{{\mathrm{\&beta;}}_{1,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{1,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^t\left(n\right)}$

$=\frac{h_0^{\mathrm{cr}}\left(n\right)}{\frac{h_{\mathrm{Air}}\left(n\right)}{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}=\frac{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}{h_{\mathrm{Air}}\left(n\right)}$

In S302, RRU1 receives after correction signal, does not carry out channel estimating, and the ratio of the transceiver channel of the RRU1 after compensation is:

$\frac{{\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{1,0}}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{1,1}}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{1,1}}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}^t\left(n\right)}=...=\frac{{\mathrm{\&beta;}}_{1,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{1,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^t\left(n\right)}$

$=\frac{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}{\frac{h_{\mathrm{Air}}\left(n\right)\&CenterDot;s\left(n\right)}{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}=\frac{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}{h_{\mathrm{Air}}\left(n\right)\&CenterDot;s\left(n\right)}$

The difference of the ratio formula of above-mentioned two transceiver channels is, in S303, RRU1 receives after correction signal, while not carrying out channel estimating, and many s (n).

Visible, respectively RRU0 and RRU1 to be sent out after channel compensation, the ratio of the transceiver channel response of each service channel of RRU0 and RRU1 is identical, is all or having realized the joint channel of a plurality of RRU proofreaies and correct.

Optionally, by the first receipts self-correcting coefficient and the first penalty coefficient μ ₀(n) ratio is as the first receipts correction coefficient

by the second receipts self-correcting coefficient and the second penalty coefficient μ ₁(n) ratio is as the second receipts correction coefficient

that is:

${\widetilde{\mathrm{\&beta;}}}_{k,i}^{\mathrm{UL}}\left(n\right)=\frac{{\mathrm{\&beta;}}_{k,i}^{\mathrm{UL}}\left(n\right)}{{\mathrm{\&mu;}}_k\left(n\right)},k=\mathrm{0,1}$

Optionally, by the first transmit-receive combination self-correcting coefficient and the first penalty coefficient μ ₀(n) ratio is as the first transmit-receive combination correction coefficient

by the second transmit-receive combination self-correcting coefficient and the second penalty coefficient μ ₁(n) ratio is as the second transmit-receive combination correction coefficient

that is:

${\widehat{\mathrm{\&beta;}}}_{k,i}\left(n\right)=\frac{{\mathrm{\&beta;}}_{k,i}\left(n\right)}{{\mathrm{\&mu;}}_k\left(n\right)},k=\mathrm{0,1}$

Its compensation way and first correction coefficient are similar, and the present embodiment repeats no more.

Need explanation, after obtaining correction coefficient, just completed the joint channel of many RRU is proofreaied and correct, follow-up according to correction coefficient, to carry out channel compensation can be in order to verify described correction coefficient, or carried out channel compensation before transmitting normal signal.

In the present embodiment, by RRU0 and RRU1 are carried out respectively to self-correcting, obtain the first self-correcting coefficient and the second self-correcting coefficient, then by any one antenna in RRU0 and any one antenna in RRU1, mutually transmit and receive correction signal, obtain the first penalty coefficient and the second penalty coefficient, and obtain the first correction coefficient and the second correction coefficient according to described the first self-correcting coefficient, the second self-correcting coefficient and the first penalty coefficient, the second penalty coefficient, respectively RRU0 and RRU1 are carried out to channel compensation, the joint channel that completes a plurality of RRU is proofreaied and correct.

Embodiment bis-

As depicted in figs. 1 and 2, embodiment bis-is equally with channel correcting between two RRU, and each RRU comprises that again 4 antennas (actual antennas number can be arbitrary integer) describe for example.

The method flow schematic diagram that between a kind of a plurality of RRU that Fig. 5 provides for embodiment bis-, joint channel is proofreaied and correct, as shown in Figure 5, the method comprises:

S501:RRU0 and RRU1 carry out respectively self-correcting;

In the present embodiment, RRU0 and RRU1 are respectively a RRU and the 2nd RRU, and this step is identical with the S301 in embodiment mono-, RRU0 and RRU1 obtain the first self-correcting coefficient and the second self-correcting coefficient after completing respectively self-correcting, the first self-correcting coefficient comprises that again the first receipts self-correcting coefficient and first is from correction coefficient, and the second self-correcting coefficient comprises that again the second receipts self-correcting coefficient and second is from correction coefficient.

S502: by the first antenna transmission correction signal in RRU0, correction signal described in the second antenna reception in RRU1; By correction signal described in the second antenna transmission in RRU1, correction signal described in the first antenna reception in RRU0;

This step is roughly the same with the S302 in embodiment mono-, and difference is that correction signal is different, and in the present embodiment, correction signal is reference sequences S, so the correction signal of the n of the antenna 0 of RRU0 sub-carrier transmit is:

s(n)，n＝0，1，…，N-1

The correction signal that n subcarrier of the antenna 0 of RRU1 receives is:

${\tilde{r}}_{\mathrm{1,0}}\left(n\right)={\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air}}\left(n\right)\&CenterDot;h_{\mathrm{0,0}}^t\left(n\right)\&CenterDot;s\left(n\right),n=\mathrm{0,1},...,N-1$

RRU1 receives after correction signal, and the corresponding Base Band Unit of RRU1 carries out channel estimating by reference sequences S, and the second channel response that the individual sub-carrier estimation of n goes out is:

${\mathrm{\&gamma;}}_{\mathrm{1,0}}\left(n\right)={\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right),n=\mathrm{0,1},...,N-1$

Optionally, RRU1 receives after correction signal, does not carry out channel estimating, and the response of the second channel of n subcarrier is:

${\mathrm{\&gamma;}}_{\mathrm{1,0}}\left(n\right)={\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right)\&CenterDot;s\left(n\right),n=\mathrm{0,1},...,N-1$

The correction signal of the n of the antenna 0 of a RRU1 carrier transmit is:

s(n)，n＝0，1，...，N-1

The correction signal that n subcarrier of the antenna 0 of RRU0 receives is:

${\tilde{r}}_{\mathrm{0,0}}\left(n\right)=h_{\mathrm{0,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air}}\left(n\right)\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)\&CenterDot;s\left(n\right),n=\mathrm{0,1},...,N-1$

RRU0 receives after correction signal, by reference sequences S, carries out channel estimating, and the first channel response that the individual sub-carrier estimation of n goes out is:

${\mathrm{\&gamma;}}_{\mathrm{0,0}}\left(n\right)=h_{\mathrm{0,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air}}\left(n\right)\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right),n=\mathrm{0,1},...,N-1$

Optionally, RRU0 receives after correction signal, does not carry out channel estimating, and the first channel response of n subcarrier is:

${\mathrm{\&gamma;}}_{\mathrm{0,0}}\left(n\right)=h_{\mathrm{0,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air}}\left(n\right)\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)\&CenterDot;s\left(n\right),n=\mathrm{0,1},...,N-1$

S503: obtain the first penalty coefficient and the second penalty coefficient according to described the first channel response and second channel response;

By X2 interface or privately owned communication interface between the corresponding Base Band Unit of RRU0 and the corresponding Base Band Unit of RRU1, by the service channel 0 drawing during RRU0 self-correcting in step 501 first from correction coefficient

n=0,1 ..., N-1 sends to RRU1, then receives self-correcting coefficient according to second of the service channel 0 drawing during RRU1 self-correcting in S501

n=0,1 ..., N-1, by γ _1,0(n) with

product as the second penalty coefficient μ ₁(n):

${\mathrm{\&mu;}}_1\left(n\right)={\mathrm{\&gamma;}}_{\mathrm{1,0}}\left(n\right){\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{DL}}{\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{UL}}={\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)h_{\mathrm{Air}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right)\&CenterDot;\frac{1}{h_{\mathrm{0,0}}^t\left(n\right)h_0^{\mathrm{cr}}\left(n\right)}\&CenterDot;\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}=\frac{h_{\mathrm{Air}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right)},$

$n=\mathrm{0,1},...,N-1$

Optionally, when RRU1 receives after correction signal, while not carrying out channel estimating:

${\mathrm{\&mu;}}_1\left(n\right)={\mathrm{\&gamma;}}_{\mathrm{1,0}}\left(n\right){\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{DL}}{\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{UL}}={\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)h_{\mathrm{Air}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right)s\left(n\right)\&CenterDot;\frac{1}{h_{\mathrm{0,0}}^t\left(n\right)h_0^{\mathrm{cr}}\left(n\right)}\&CenterDot;\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}=\frac{h_{\mathrm{Air}}\left(n\right)s\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right)}$

$,n=\mathrm{0,1},...,N-1$

By X2 interface or privately owned communication interface between the corresponding Base Band Unit of RRU0 and the corresponding Base Band Unit of RRU1, by second of the service channel 0 drawing during RRU1 self-correcting in step 501, receive self-correcting coefficient

n=0,1 ..., N-1 sends to RRU0, then according to first of the service channel 0 drawing during RRU0 self-correcting in step 501 from correction coefficient

n=0,1 ..., N-1, by γ _0,0(n) with product as the first penalty coefficient μ ₀(n):

${\mathrm{\&mu;}}_0\left(n\right)={\mathrm{\&gamma;}}_{0,0}\left(n\right){\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{UL}}{\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{DL}}=h_{\mathrm{0,0}}^r\left(n\right)h_{\mathrm{Air}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)\&CenterDot;\frac{1}{h_{\mathrm{0,0}}^t\left(n\right)h_0^{\mathrm{ct}}\left(n\right)}\&CenterDot;\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}=\frac{h_{\mathrm{Air}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right)}$

$,n=\mathrm{0,1},...,N-1$

Optionally, when RRU1 receives after correction signal, while not carrying out channel estimating:

${\mathrm{\&mu;}}_0\left(n\right)={\mathrm{\&gamma;}}_{\mathrm{0,0}}\left(n\right){\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{UL}}{\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{DL}}=h_{\mathrm{0,0}}^r\left(n\right)h_{\mathrm{Air}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)s\left(n\right)\&CenterDot;\frac{1}{h_{\mathrm{0,0}}^r\left(n\right)h_0^{\mathrm{ct}}\left(n\right)}\&CenterDot;\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}=\frac{h_{\mathrm{Air}}\left(n\right)s\left(n\right)}{h_0^{\mathrm{ct}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}$

$,n=\mathrm{0,1},...,N-1$

It should be noted that, in the present embodiment, both can between RRU, first launch mutually and receive correction signal, calculate again penalty coefficient, also can first to RRU1, launch the first correction signal by RRU0, RRU01 calculates the second penalty coefficient after receiving described the first correction signal, and then RRU1 launches the second correction signal to RRU0, and RRU0 calculates the first penalty coefficient after receiving described the second correction signal.

S504: obtain the first correction coefficient according to the first penalty coefficient and the first self-correcting coefficient, obtain the second correction coefficient according to the second penalty coefficient and the second self-correcting coefficient, and respectively RRU0 and RRU1 are carried out to channel compensation.

By the first penalty coefficient μ ₀(n) and the first product from correction coefficient is as first correction coefficient by the second penalty coefficient μ ₁(n) and the second product from correction coefficient is as second correction coefficient

that is:

${\widetilde{\mathrm{\&beta;}}}_{k,i}^{\mathrm{DL}}\left(n\right)={\mathrm{\&mu;}}_k\left(n\right){\mathrm{\&beta;}}_{k,i}^{\mathrm{DL}}\left(n\right)$

According to described first correction coefficient, RRU0 is sent out to channel compensation, the ratio of the transceiver channel of the RRU0 after compensation is:

$\frac{{\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,0}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{0,0}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{0,1}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,1}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{0,1}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,1}}^t\left(n\right)}=...=\frac{{\mathrm{\&beta;}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^t\left(n\right)}$

$=\frac{h_0^{\mathrm{cr}}\left(n\right)}{\frac{h_{\mathrm{Air}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_0^{\mathrm{ct}}\left(n\right)}{h}_0^{\mathrm{ct}}\left(n\right)}=\frac{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}{h_{\mathrm{Air}}\left(n\right)}$

In S502, RRU0 receives after correction signal, does not carry out channel estimating, and the ratio of the transceiver channel of the RRU0 after compensation is:

$\frac{{\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,0}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{0,0}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{0,1}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,1}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{0,1}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,1}}^t\left(n\right)}=...=\frac{{\mathrm{\&beta;}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^t\left(n\right)}$

$=\frac{h_0^{\mathrm{cr}}\left(n\right)}{\frac{h_{\mathrm{Air}}\left(n\right)\&CenterDot;s\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_0^{\mathrm{ct}}\left(n\right)}{h}_0^{\mathrm{ct}}\left(n\right)}=\frac{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}{h_{\mathrm{Air}}\left(n\right)\&CenterDot;s\left(n\right)}$

The difference of the ratio formula of above-mentioned two transceiver channels is, in S402, RRU0 receives after correction signal, while not carrying out channel estimating, and many s (n).

From correction coefficient, RRU1 is sent out to channel compensation according to described second, the ratio of the transceiver channel of the RRU1 after compensation is:

$\frac{{\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{1,0}}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{1,1}}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{1,1}}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}^t\left(n\right)}=...=\frac{{\mathrm{\&beta;}}_{1,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{1,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^t\left(n\right)}$

$=\frac{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}{\frac{h_{\mathrm{Air}}\left(n\right)}{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}=\frac{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}{h_{\mathrm{Air}}\left(n\right)}$

In S502, RRU1 receives after correction signal, does not carry out channel estimating, and the ratio of the transceiver channel of the RRU1 after compensation is:

$\frac{{\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{1,0}}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{1,1}}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{1,1}}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}^t\left(n\right)}=...=\frac{{\mathrm{\&beta;}}_{1,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{1,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^t\left(n\right)}$

$=\frac{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}{\frac{h_{\mathrm{Air}}\left(n\right)\&CenterDot;s\left(n\right)}{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}=\frac{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}{h_{\mathrm{Air}}\left(n\right)\&CenterDot;s\left(n\right)}$

The difference of the ratio formula of above-mentioned two transceiver channels is, in S503, RRU1 receives after correction signal, while not carrying out channel estimating, and many s (n).

Visible, respectively RRU0 and RRU1 to be sent out after channel compensation, the ratio of the transceiver channel response of each service channel of RRU0 and RRU1 is identical, is all

or the joint channel that has completed a plurality of RRU is proofreaied and correct.

Optionally, by the first receipts self-correcting coefficient and the first penalty coefficient μ ₀(n) ratio is as the first new receipts correction coefficient, by the second receipts self-correcting coefficient and the second penalty coefficient μ ₁(n) ratio is as the second receipts correction coefficient, that is:

${\widetilde{\mathrm{\&beta;}}}_{k,i}^{\mathrm{UL}}\left(n\right)=\frac{{\mathrm{\&beta;}}_{k,i}^{\mathrm{UL}}\left(n\right)}{{\mathrm{\&mu;}}_k\left(n\right)}$

Optionally, by transmit-receive combination self-correcting coefficient and the first penalty coefficient μ ₀(n) ratio is as the first transmit-receive combination correction coefficient, by transmit-receive combination correction coefficient and the second penalty coefficient μ ₁(n) ratio is as the second new transmit-receive combination correction coefficient, that is:

${\widehat{\mathrm{\&beta;}}}_{k,i}\left(n\right)=\frac{{\widetilde{\mathrm{\&beta;}}}_{k,i}\left(n\right)}{{\mathrm{\&mu;}}_k\left(n\right)}$

Its channel compensation mode is with to send out channel compensation according to first correction coefficient similar, and the present embodiment repeats no more.

In the present embodiment, by RRU0 and RRU1 are carried out respectively to self-correcting, obtain the first self-correcting coefficient and the second self-correcting coefficient, then by any one antenna in RRU0 and any one antenna in RRU1, mutually transmit and receive correction signal, obtain the first penalty coefficient and the second penalty coefficient, and obtain the first correction coefficient and the second correction coefficient according to described the first self-correcting coefficient, the second self-correcting coefficient and the first penalty coefficient, the second penalty coefficient, respectively RRU0 and RRU1 are carried out to channel compensation, the joint channel that completes a plurality of RRU is proofreaied and correct.

Embodiment tri-

Embodiment tri-is with channel correcting between 3 RRU, each RRU comprises that again 4 antennas (actual antennas number can be arbitrary integer) describe for example, in embodiment, with i, represent the antenna of RRU, i=0,1,2,3, as shown in Figure 6, it should be noted that, Fig. 6 is outer correction type, but the applicable equally the present embodiment of interior correction type.

The method flow schematic diagram that between a kind of a plurality of RRU that Fig. 7 provides for embodiment tri-, joint channel is proofreaied and correct, as shown in Figure 7, the method that the joint channel between 3 RRU is proofreaied and correct comprises:

S701:RRU0, RRU1 and RRU2 carry out respectively self-correcting;

In the present embodiment, RRU0, RRU1 and RRU2 are respectively a RRU, the 2nd RRU and the 3rd RRU, and this step is identical with the S301 in embodiment mono-, RRU0, RRU1, RRU2 obtain the first self-correcting coefficient, the second self-correcting coefficient, the 3rd self-correcting coefficient after completing respectively self-correcting, the first self-correcting coefficient comprises that again the first receipts self-correcting coefficient and first is from correction coefficient, the second self-correcting coefficient comprises that again the second receipts self-correcting coefficient and second is from correction coefficient, and the 3rd self-correcting coefficient comprises that again the 3rd receives self-correcting coefficient and the 3rd from correction coefficient.

S702: select arbitrarily two in 3 RRU, as RRU0 and RRU1, make RRU0 and RRU1 complete joint channel between many RRU according to the method described in embodiment mono-or embodiment bis-and proofread and correct;

Complete between many RRU of RRU0 and RRU1 after joint channel is proofreaied and correct:

First correction coefficient that i service channel of RRU0 is corresponding is:

${\widetilde{\mathrm{\&beta;}}}_{0,i}^{\mathrm{DL}}\left(n\right)=\frac{h_{\mathrm{Air},01}\left(n\right)}{h_0^{\mathrm{ct}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right)h_{0,i}^t\left(n\right)},i=\mathrm{0,1},...,N_{\mathrm{ANT}}-1$

The first receipts self-correcting coefficient that i service channel of RRU0 is corresponding is:

${\mathrm{\&beta;}}_{0,i}^{\mathrm{UL}}\left(n\right)=\frac{1}{h_0^{\mathrm{ct}}\left(n\right)h_{0,i}^r\left(n\right)},i=\mathrm{0,1},...,N_{\mathrm{ANT}}-1$

H wherein _{air, 01}(n) represent joint channel timing between RRU, RRU1 selects certain root antenna (being antenna 0 in the present embodiment) transmitting, when RRU0 selects certain root antenna (being antenna 0 in the present embodiment) to receive, and the corresponding channel response of eating dishes without rice or wine.For TDD, because the up-downgoing channel response of eating dishes without rice or wine equates there is h _{air, 10}(n)=h _{air, 01}(n).

Second correction coefficient that i service channel of RRU1 is corresponding is:

${\widetilde{\mathrm{\&beta;}}}_{1,i}^{\mathrm{DL}}\left(n\right)=\frac{h_{\mathrm{Air},01}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,i}^t\left(n\right)},i=\mathrm{0,1},...,N_{\mathrm{ANT}}-1$

The second receipts self-correcting coefficient that i service channel of RRU1 is corresponding is:

${\mathrm{\&beta;}}_{1,i}^{\mathrm{UL}}\left(n\right)=\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,i}^r\left(n\right)},i=\mathrm{0,1},...,N_{\mathrm{ANT}}-1$

S703:RRU0 and RRU1 calculate respectively after correction coefficient separately, select any one RRU and RRU2 in RRU0 and RRU1 to carry out joint channel correction between many RRU according to the method described in embodiment mono-or embodiment bis-;

Select the method for embodiment mono-to be elaborated below:

RRU0 and RRU1 calculate respectively after correction coefficient separately, regard RRU0 and RRU1 as a virtual RRU, and select a RRU and RRU2 to carry out joint channel correction.In the present embodiment, select RRU1 and RRU2 to carry out joint channel between many RRU and proofread and correct.In S701, RRU0, RRU1 and RRU2 had carried out self-correcting, therefore RRU1 and RRU2 carry out joint channel timing, can omit self-tuning step, directly by second antenna transmission the second correction signal in RRU1 ', the third antenna in RRU2 receive described the second correction signal '; Third antenna transmitting the 3rd correction signal by RRU2, the 3rd correction signal described in the second antenna reception in RRU1; The second antenna and third antenna are respectively any antenna in RRU1 and RRU2.In the present embodiment, the antenna 0 that RRU1 and RRU2 select respectively its service channel 0 correspondence is as the second antenna and third antenna:

1) make RRU1 pass through second antenna transmission the second correction signal ', make RRU2 by third antenna receive described the second correction signal ', described the second correction signal ' be: choose specific calibration reference sequence, as the various training sequences or the reference signal sequence that adopt in the systems such as LTE and WiMAX, be designated as reference sequences S, and by described calibration reference sequence and second correction coefficient

take advantage of rear as the second correction signal ', therefore the second correction signal ' be different from the second correction signal in previous embodiment.

Optionally, at RRU1, by second antenna transmission the second correction signal ' time, close other passages except a passage of service channel corresponding to the second antenna in RRU1, to avoid interference.

The second correction signal of the n of the second antenna of a RRU1 carrier transmit ' be:

${\widetilde{\mathrm{\&beta;}}}_{\mathrm{1,0}}^{\mathrm{DL}}\left(n\right)s\left(n\right),n=\mathrm{0,1}....,N-1$

The second correction signal that n subcarrier of the third antenna of RRU2 receives ' be:

${\tilde{r}}_{\mathrm{2,0}}^{\&prime;}\left(n\right)=h_{\mathrm{2,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air},12}\left(n\right)\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)\&CenterDot;{\widetilde{\mathrm{\&beta;}}}_{\mathrm{1,0}}^{\mathrm{DL}}\left(n\right)\&CenterDot;s\left(n\right),n=\mathrm{0,1}....,N-1$

RRU2 receive the second correction signal ' after, by reference sequences S, carry out channel estimating, according in step S702

the 3rd channel response that the individual sub-carrier estimation of n goes out is:

${\mathrm{\&gamma;}}_{\mathrm{2,0}}\left(n\right)=\frac{h_{\mathrm{2,0}}^r\left(n\right)h_{\mathrm{Air},01}\left(n\right)h_{\mathrm{Air},12}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)},n=\mathrm{0,1},...,N-1$

Optionally, RRU2 receives after correction signal, does not carry out channel estimating, and the 3rd channel response of n subcarrier is:

${\mathrm{\&gamma;}}_{\mathrm{2,0}}\left(n\right)=\frac{h_{\mathrm{2,0}}^r\left(n\right)h_{\mathrm{Air},01}\left(n\right)h_{\mathrm{Air},12}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}\&CenterDot;s\left(n\right),n=\mathrm{0,1},...,N-1$

2) make RRU2 launch the 3rd correction signal by third antenna, make RRU1 pass through the 3rd correction signal described in the second antenna reception; Described the 3rd correction signal is: by described calibration reference sequence, for example described reference sequences S and the 3rd after correction coefficient multiplies each other as the 3rd correction signal.

Optionally, when RRU2 launches the 3rd correction signal by third antenna, close other passages except a passage of service channel corresponding to third antenna in RRU2, to avoid interference.

The 3rd correction signal of the n of the third antenna of a RRU2 carrier transmit is:

${\mathrm{\&beta;}}_{\mathrm{2,0}}^{\mathrm{DL}}\left(n\right)s\left(n\right),n=\mathrm{0,1},...,N-1$

The 3rd correction signal that n subcarrier of the second antenna of RRU1 receives is:

${\tilde{r}}_{\mathrm{1,0}}^{\&prime;}\left(n\right)={\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air},12}\left(n\right)\&CenterDot;h_{\mathrm{2,0}}^t\left(n\right)\&CenterDot;{\mathrm{\&beta;}}_{\mathrm{2,0}}^{\mathrm{DL}}\left(n\right)\&CenterDot;s\left(n\right),n=\mathrm{0,1},...,N-1$

RRU1 receives after correction signal, by reference sequences S, carries out channel estimating, and the second channel that the individual sub-carrier estimation of n goes out responds ' is:

${\mathrm{\&gamma;}}_{\mathrm{1,0}}^{\&prime;}\left(n\right)=\frac{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air},12}\left(n\right)}{h_2^{\mathrm{cr}}\left(n\right)},n=\mathrm{0,1}....,N-1,$

Optionally, RRU1 receives after correction signal, does not carry out channel estimating, and the second channel of n subcarrier responds ' is:

${\mathrm{\&gamma;}}_{\mathrm{1,0}}^{\&prime;}\left(n\right)=\frac{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air},12}\left(n\right)}{h_2^{\mathrm{cr}}\left(n\right)}\&CenterDot;s\left(n\right),n=\mathrm{0,1}....,N-1$

S704: according to the response of described second channel ' and the 3rd channel response obtain the second penalty coefficient ' and the 3rd penalty coefficient;

Therefore in the present embodiment, RRU2 has selected the antenna 0 of service channel 0 correspondence as third antenna, receives self-correcting coefficient according to the 3rd of the service channel 0 drawing during RRU2 self-correcting in step 701 the

n=0,1...., N-1, by γ _2,0(n) with

product as the 3rd penalty coefficient υ ₂(n):

${\mathrm{\&upsi;}}_2\left(n\right)=\frac{h_{\mathrm{Air},\mathrm{0,1}}\left(n\right)h_{\mathrm{Air},\mathrm{1,2}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_2^{\mathrm{ct}}\left(n\right)},n=\mathrm{0,1}....,N-1$

Optionally, when RRU2 receives after correction signal, while not carrying out channel estimating:

${\mathrm{\&upsi;}}_2\left(n\right)=\frac{h_{\mathrm{Air},\mathrm{0,1}}\left(n\right)h_{\mathrm{Air},\mathrm{1,2}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_2^{\mathrm{ct}}\left(n\right)}\&CenterDot;s\left(n\right),n=\mathrm{0,1}....,N-1$

Therefore in the present embodiment, RRU1 has selected the antenna 0 of service channel 0 correspondence as the second antenna, receives self-correcting coefficient according to second of the service channel 0 drawing during RRU1 self-correcting in step 701

n=0,1...., N-1, by γ ' _1,0(n) with

product as the second penalty coefficient ' υ ₁(n):

${\mathrm{\&upsi;}}_1\left(n\right)=\frac{h_{\mathrm{Air},\mathrm{1,2}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_2^{\mathrm{cr}}\left(n\right)},n=\mathrm{0,1}....,N-1$

Optionally, when RRU1 receives after correction signal, while not carrying out channel estimating:

${\mathrm{\&upsi;}}_1\left(n\right)=\frac{h_{\mathrm{Air},\mathrm{1,2}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_2^{\mathrm{cr}}\left(n\right)}\&CenterDot;s\left(n\right),n=\mathrm{0,1}....,N-1$

It should be noted that, in the present embodiment, both can between RRU, first complete transmitting and receiving of correction signal, calculate again penalty coefficient, also can RRU1 first to RRU2 launch the second correction signal ', RRU2 receive described the second correction signal ' after calculate the 3rd penalty coefficient, then RRU2 is to RRU1 transmitting the 3rd correction signal, RRU1 receive calculate after described the 3rd correction signal the second penalty coefficient '.

S705: according to the second penalty coefficient ' and the second correction coefficient obtain the second correction coefficient ', according to the 3rd penalty coefficient and the 3rd self-correcting coefficient, obtain the 3rd correction coefficient, and respectively RRU1 and RRU2 carried out to channel compensation.

By the second penalty coefficient ' υ ₁(n) product of and the second correction coefficient as second correction coefficient '

by the 3rd penalty coefficient υ ₂(n) the and three product from correction coefficient is as the 3rd correction coefficient ${\widetilde{\mathrm{\&beta;}}}_{2,i}^{\&prime;\mathrm{DL}}\left(n\right)={\mathrm{\&upsi;}}_2\left(n\right){\mathrm{\&beta;}}_{2,i}^{\mathrm{DL}}\left(n\right).$

Before S705 or afterwards, community 1 that need to be by RRU1 place is by the second penalty coefficient ' υ ₁(n) send to community, RRU0 place 0, and according to the second penalty coefficient ' υ ₁(n) the first correction coefficient of RRU0 is upgraded to first correction coefficient of the RRU0 after renewal ' be:

According to described first correction coefficient ' RRU0 is sent out to channel compensation, the ratio of the transceiver channel of the RRU0 after compensation is:

$\frac{{\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,0}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{0,0}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{0,1}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,1}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{0,1}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,1}}^t\left(n\right)}=...=\frac{{\mathrm{\&beta;}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^t\left(n\right)}$

$=\frac{\frac{1}{h_0^{\mathrm{ct}}\left(n\right)}}{\frac{h_{\mathrm{Air},\mathrm{1,2}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_2^{\mathrm{cr}}\left(n\right)}\&CenterDot;\frac{h_{\mathrm{Air},\mathrm{0,1}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_0^{\mathrm{ct}}\left(n\right)}\&CenterDot;\frac{1}{h_0^{\mathrm{cr}}\left(n\right)}}=\frac{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_2^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right)}{h_{\mathrm{Air},\mathrm{1,2}}\left(n\right)h_{\mathrm{Air},\mathrm{0,1}}\left(n\right)}$

According to described second correction coefficient ' RRU1 is sent out to channel compensation, the ratio of the transceiver channel of the RRU1 after compensation is:

$\frac{{\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,0}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{0,0}}^{\&prime;\mathrm{DL}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{0,1}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,1}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{0,1}}^{\&prime;\mathrm{DL}}\left(n\right)h_{\mathrm{0,1}}^t\left(n\right)}=...=\frac{{\mathrm{\&beta;}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{0,N_{\mathrm{ANT}}-1}^{\&prime;\mathrm{DL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^t\left(n\right)}$

$=\frac{\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}}{\frac{h_{\mathrm{Air},\mathrm{1,2}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_2^{\mathrm{cr}}\left(n\right)}\&CenterDot;\frac{h_{\mathrm{Air},\mathrm{0,1}}\left(n\right)}{h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}\&CenterDot;\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}}=\frac{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_2^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right)}{h_{\mathrm{Air},\mathrm{1,2}}\left(n\right)h_{\mathrm{Air},\mathrm{0,1}}\left(n\right)}$

According to described the 3rd correction coefficient, RRU2 is sent out to channel compensation, the ratio of the transceiver channel of the RRU2 after compensation is:

$\frac{{\mathrm{\&beta;}}_{\mathrm{2,0}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{2,0}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{2,0}}^{\&prime;\mathrm{DL}}\left(n\right)h_{\mathrm{2,0}}^t\left(n\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{2,1}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{2,1}}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{\mathrm{2,1}}^{\&prime;\mathrm{DL}}\left(n\right)h_{\mathrm{2,1}}^t\left(n\right)}=...=\frac{{\mathrm{\&beta;}}_{2,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right)h_{2,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\widetilde{\mathrm{\&beta;}}}_{2,N_{\mathrm{ANT}}-1}^{\&prime;\mathrm{DL}}\left(n\right)h_{2,N_{\mathrm{ANT}}-1}^t\left(n\right)}$

$=\frac{\frac{1}{h_2^{\mathrm{ct}}\left(n\right)}}{\frac{h_{\mathrm{Air},\mathrm{0,1}}\left(n\right)h_{\mathrm{Air},\mathrm{1,2}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_2^{\mathrm{ct}}\left(n\right)}\&CenterDot;\frac{1}{h_2^{\mathrm{cr}}\left(n\right)}}=\frac{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_2^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right)}{h_{\mathrm{Air},\mathrm{1,2}}\left(n\right)h_{\mathrm{Air},\mathrm{0,1}}\left(n\right)}$

Visible, respectively RRU0, RRU1 and RRU2 to be sent out after channel compensation, the ratio of the transceiver channel response of each service channel of these three RRU is identical, is all

the joint channel that has completed a plurality of RRU is proofreaied and correct.

Other optional steps of the present embodiment are as described in embodiment mono-and embodiment bis-, and the present embodiment repeats no more.

Need explanation, after obtaining correction coefficient, just completed the joint channel of many RRU is proofreaied and correct, follow-up according to correction coefficient, to carry out channel compensation can be in order to verify described correction coefficient, or carried out channel compensation before transmitting normal signal.

In the present embodiment, 3 RRU are carried out to joint channel correction, first according to the method for embodiment mono-or embodiment bis-, RRU0 and RRU1 are completed after joint channel correction, select again RRU1 and RRU2 to carry out joint channel correction, RRU1 obtain the second penalty coefficient ', send to RRU0, RRU2 obtains after the 3rd penalty coefficient, RRU0 and RRU1 are according to described the second penalty coefficient ' renewal the first self-correcting coefficient and the second self-correcting coefficient, obtain the first correction coefficient ' and the second correction coefficient ', RRU2 obtains the 3rd self-correcting coefficient according to the 3rd penalty coefficient, and respectively to RRU0, RRU1 and RRU2 carry out channel compensation.

Embodiment tetra-

Embodiment tetra-is with channel correcting between k RRU, k >=3, each RRU comprises that again 4 antennas (actual antennas number can be arbitrary integer), for example describes, represent the antenna of RRU with i in embodiment, i=0,1,2,3, as shown in Figure 8, it should be noted that, Fig. 8 is outer correction type, but the applicable equally the present embodiment of interior correction type.

The method flow schematic diagram that between a kind of a plurality of RRU that Fig. 9 provides for embodiment mono-, joint channel is proofreaied and correct, as shown in Figure 9, the method for the joint channel correction between k RRU comprises:

S901:RRU0, RRU1 ..., RRUk carries out respectively self-correcting;

This step is identical with the S301 in embodiment mono-, RRU0, RRU1 ..., RRUk obtains self-correcting coefficient separately after completing respectively self-correcting.

S902:RRU0 and RRU1 complete joint channel between RRU according to the method described in embodiment mono-or embodiment bis-and proofread and correct;

S903:RRU0, RRU1 and RRU2 complete joint channel according to the method described in embodiment tri-and proofread and correct; Now RRU0 and RRU1 proofread and correct owing to having completed two joint channel between RRU at S902, and now RRU0 and RRU1 regard together a virtual RRU as and continued two joint channel corrections between RRU with RRU2;

S904:RRU0, RRU1, RRU2 complete joint channel at S903 and proofread and correct, and as a virtual RRU and RRU3, proceed joint channel correction;

S905: by that analogy, proofread and correct until complete the joint channel of all k RRU.

Embodiment five

Embodiment five is the same with enforcement three, is the embodiment that 3 RRU joint channel are proofreaied and correct.

Embodiment five is with channel correcting between 3 RRU, each RRU comprises that again 4 antennas (actual antennas number can be arbitrary integer) describe for example, in embodiment, with i, represent the antenna of RRU, i=0,1,2,3, as shown in Figure 6, it should be noted that, Fig. 6 is outer correction type, but the applicable equally the present embodiment of interior correction type.

The method flow schematic diagram that between a kind of a plurality of RRU that Figure 10 provides for embodiment five, joint channel is proofreaied and correct, as shown in figure 10, the method that the joint channel between 3 RRU is proofreaied and correct comprises:

S1001:RRU0, RRU1 and RRU2 carry out respectively self-correcting;

This step is identical with the S301 in embodiment mono-, RRU0, RRU1, RRU2 obtain the first self-correcting coefficient, the second self-correcting coefficient, the 3rd self-correcting coefficient after completing respectively self-correcting, the first self-correcting coefficient comprises that again the first receipts correction coefficient and first is from correction coefficient, the second self-correcting coefficient comprises that again the second receipts correction coefficient and second is from correction coefficient, and the 3rd self-correcting coefficient comprises that again the 3rd receives correction coefficient and the 3rd correction coefficient.

From correction coefficient, be: ${\mathrm{\&beta;}}_{k,i}^{\mathrm{DL}}\left(n\right)=\frac{1}{h_k^{\mathrm{cr}}\left(n\right)h_{k,i}^t\left(n\right)},k=\mathrm{0,1,2},i=\mathrm{0,1},...,N_{\mathrm{ANT}}-1,n=\mathrm{0,1},...,N-1$

Receiving self-correcting coefficient is: ${\mathrm{\&beta;}}_{k,i}^{\mathrm{UL}}\left(n\right)=\frac{1}{h_k^{\mathrm{ct}}\left(n\right)h_{k,i}^r\left(n\right)},k=\mathrm{0,1,2},i=\mathrm{0,1},...,N_{\mathrm{ANT}}-1,n=\mathrm{0,1},...,N-1$

First receives correction coefficient from correction coefficient and first is respectively:

${\mathrm{\&beta;}}_{0,i}^{\mathrm{DL}}\left(n\right)=\frac{1}{h_0^{\mathrm{cr}}\left(n\right)h_{0,i}^t\left(n\right)},$ ${\mathrm{\&beta;}}_{0,i}^{\mathrm{UL}}\left(n\right)=\frac{1}{h_0^{\mathrm{ct}}\left(n\right)h_{0,i}^r\left(n\right)}$

Second receives correction coefficient from correction coefficient and second is respectively:

${\mathrm{\&beta;}}_{1,i}^{\mathrm{DL}}\left(n\right)=\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,i}^t\left(n\right)},$ ${\mathrm{\&beta;}}_{1,i}^{\mathrm{UL}}\left(n\right)=\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,i}^r\left(n\right)}$

The 3rd receives self-correcting coefficient from correction coefficient and the 3rd is respectively:

${\mathrm{\&beta;}}_{2,i}^{\mathrm{DL}}\left(n\right)=\frac{1}{h_2^{\mathrm{cr}}\left(n\right)h_{2,i}^t\left(n\right)},$ ${\mathrm{\&beta;}}_{2,i}^{\mathrm{UL}}\left(n\right)=\frac{1}{h_2^{\mathrm{ct}}\left(n\right)h_{2,i}^r\left(n\right)}$

S1002:RRU0 and RRU1 complete joint channel according to the method described in embodiment mono-or embodiment bis-and proofread and correct;

Complete after joint channel correction, RRU0 and RRU1 obtain respectively the first correction coefficient and the second correction coefficient.Channel compensation between RRU can be selected only to act on and receive in correction coefficient, also can select only to act on and send out in correction coefficient, under the scene of transmit-receive combination channel correcting, acts in transmit-receive combination correction coefficient, only take below to send out correction coefficient and be described as example.

Sending out correction coefficient can be expressed as: ${\widetilde{\mathrm{\&beta;}}}_{k,i}^{\mathrm{DL}}\left(n\right)={\mathrm{\&mu;}}_k\left(n\right){\mathrm{\&beta;}}_{k,i}^{\mathrm{DL}}\left(n\right),k=\mathrm{0,1}$

First correction coefficient of RRU0 is:

First of RRU0 receives correction coefficient:

The first penalty coefficient is: ${\mathrm{\&mu;}}_0\left(n\right)=\frac{h_{\mathrm{Air},01}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_0^{\mathrm{ct}}\left(n\right)}$

Second correction coefficient of RRU1 is:

Second receives correction coefficient is:

The second penalty coefficient is:

S1003:RRU0 and RRU2 complete joint channel according to the method described in embodiment mono-or embodiment bis-and proofread and correct; Obtain first correction coefficient of RRU0 ' and first receive correction coefficient ', and the 3rd correction coefficient of RRU2 and the 3rd received correction coefficient.

First correction coefficient of RRU0 ' be:

The first receipts correction coefficient ' be:

The first penalty coefficient ' being:

The 3rd correction coefficient of RRU2:

The 3rd receives correction coefficient is:

The 3rd penalty coefficient is:

S1004:RRU1 and RRU2 complete joint channel according to the method described in embodiment mono-or embodiment bis-and proofread and correct;

RRU1 and RRU2 complete joint channel according to the method described in embodiment mono-or embodiment bis-and proofread and correct, RRU1 obtain the second penalty coefficient ', RRU2 acquisition the 3rd penalty coefficient ' after, RRU1 and RRU2 be respectively according to described the second penalty coefficient ' and the 3rd penalty coefficient ' renewal the second correction coefficient and the 3rd correction coefficient, and respectively RRU1 and RRU2 are carried out to channel compensation.

Second correction coefficient of RRU1 ' be:

The second receipts correction coefficient ' be:

The second penalty coefficient ' being:

After compensation, have:

$\frac{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{\mathrm{1,0}}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)}{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{\mathrm{1,0}}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)}=\frac{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{\mathrm{1,1}}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}^r\left(n\right)}{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{\mathrm{1,1}}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}^t\left(n\right)}=...=\frac{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{1,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{1,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^t\left(n\right)}$

$=\frac{{\left(h_0^{\mathrm{cr}}\left(n\right)\right)}^2{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_2^{\mathrm{ct}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_2^{\mathrm{cr}}\left(n\right)}{h_{\mathrm{Air},01}\left(n\right)h_{\mathrm{Air},02}\left(n\right)h_{\mathrm{Air},12}\left(n\right)}$

The 3rd correction coefficient of RRU2 ' be:

The 3rd receipts correction coefficient ' be:

The 3rd penalty coefficient ' be: ${\mathrm{\&mu;}}_2^{\&prime;}\left(n\right)=\frac{h_{\mathrm{Air},01}{h}_{\mathrm{Air},12}}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_2^{\mathrm{ct}}\left(n\right)}$

After compensation, have:

$\frac{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{\mathrm{2,0}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{2,0}}^r\left(n\right)}{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{\mathrm{2,0}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{2,0}}^t\left(n\right)}=\frac{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{\mathrm{2,1}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{2,1}}^r\left(n\right)}{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{\mathrm{2,1}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{2,1}}^t\left(n\right)}=...=\frac{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{2,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{2,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^t\left(n\right)}$

$=\frac{{\left(h_0^{\mathrm{cr}}\left(n\right)\right)}^2{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_2^{\mathrm{ct}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_2^{\mathrm{cr}}\left(n\right)}{h_{\mathrm{Air},01}{h}_{\mathrm{Air},02}\left(n\right)h_{\mathrm{Air},12}}$

Visible, the equation after two compensation equates, illustrates that between RRU1 and RRU2, completing joint channel proofreaies and correct.

S1005:RRU1 is described the second penalty coefficient ' send to RRU0, RRU0 according to first correction coefficient of described second penalty coefficient ' renewal or first receive correction coefficient or the first transmit-receive combination correction coefficient obtain first correction coefficient ' or first receive correction coefficient ' or the first transmit-receive combination correction coefficient ' after RRU0 is carried out to channel compensation.The joint channel having completed between 3 RRU is proofreaied and correct.Optionally, RRU2 is described the 3rd penalty coefficient ' send to RRU0, RRU0 according to first correction coefficient of described the 3rd penalty coefficient ' renewal ' or first receive correction coefficient ' or the first transmit-receive combination correction coefficient ' after RRU0 is carried out to channel compensation.The joint channel having completed between 3 RRU is proofreaied and correct.

The RRU0 of take describes as example according to first correction coefficient of described the second penalty coefficient ' obtain:

For RRU0, upgrade first first correction coefficient that correction coefficient obtains " be:

${\stackrel{\&ap;}{\mathrm{\&beta;}}}_{0,i}^{\mathrm{DL}}\left(n\right)={\mathrm{\&mu;}}_1^{\&prime;}\left(n\right){\widetilde{\mathrm{\&beta;}}}_{0,I}^{\mathrm{DL}}\left(n\right)$

$={\mathrm{\&mu;}}_1^{\&prime;}\left(n\right){\mathrm{\&mu;}}_0\left(n\right){\mathrm{\&beta;}}_{0,i}^{\mathrm{DL}}\left(n\right)$

$=\frac{h_{\mathrm{Air},02}{h}_{\mathrm{Air},12}}{h_2^{\mathrm{cr}}{h}_0^{\mathrm{cr}}{h}_2^{\mathrm{<figure-callout\; id="1"\; label="ct\; j"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">ct</figure-callout>}}{j}_{}^{}{}_1^{\mathrm{ct}}}\frac{h_{\mathrm{Air},01}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_0^{\mathrm{ct}}\left(n\right)}\frac{1}{h_0^{\mathrm{cr}}\left(n\right)h_{0,i}^t\left(n\right)}$

${\widetilde{\mathrm{\&beta;}}}_{0,i}^{\mathrm{DL}}\left(n\right)={\mathrm{\&mu;}}_0\left(n\right){\mathrm{\&beta;}}_{0,i}^{\mathrm{DL}}\left(n\right)$

Upgrading first receives first of correction coefficient ' obtain and receives correction coefficient " be:

${\stackrel{\&ap;}{\mathrm{\&beta;}}}_{0,i}^{\mathrm{UL}}\left(n\right)={\widetilde{\mathrm{\&beta;}}}_{0,i}^{\mathrm{UL}}\left(n\right)$

After compensation, have:

$\frac{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{\mathrm{0,0}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,0}}^r\left(n\right)}{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{\mathrm{0,0}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right)}=\frac{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{\mathrm{0,1}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,1}}^r\left(n\right)}{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{\mathrm{0,1}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,1}}^t\left(n\right)}=...=\frac{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\stackrel{\&ap;}{\mathrm{\&beta;}}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^t\left(n\right)}$

$=\frac{{\left(h_0^{\mathrm{cr}}\left(n\right)\right)}^2{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_2^{\mathrm{ct}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_2^{\mathrm{cr}}\left(n\right)}{h_{\mathrm{Air},01}\left(n\right)h_{\mathrm{Air},02}\left(n\right)h_{\mathrm{Air},12}\left(n\right)}$

Obviously, the RRU0 after compensation, RRU1, equal with RRU2 equation, complete the correction of combining of 3 RRU.

Embodiment six

As shown in figure 11, embodiment six provides a kind of means for correcting, for joint channel between many RRU of communication system, proofreaies and correct, and described communication system at least comprises a RRU and the 2nd RRU, and this means for correcting comprises:

Self-tuner, for a described RRU and described the 2nd RRU are carried out respectively to self-correcting, and obtains respectively the first self-correcting coefficient and the second self-correcting coefficient;

The first controller, for second antenna transmission the first correction signal in the 2nd RRU described in the first day alignment by a described RRU, the first correction signal described in described the second antenna reception;

Second controller, by first antenna transmission the second correction signal described in described second day alignment, the second correction signal described in described the first antenna reception, obtains the first penalty coefficient;

Processor, for after the first correction signal described in described the second antenna reception, obtains the second penalty coefficient; After the second correction signal described in described the first antenna reception, obtain the first penalty coefficient; And obtain the first correction coefficient according to described the first penalty coefficient and the first self-correcting coefficient, according to described the second penalty coefficient and the second self-correcting coefficient, obtain the second correction coefficient.

Optionally, described the first self-correcting coefficient comprises that first receives self-correcting coefficient from correction coefficient and first, and the second self-correcting coefficient comprises that second receives self-correcting coefficient from correction coefficient and second; The first correction coefficient comprises first correction coefficient and the first receipts correction coefficient, and the second correction coefficient comprises second correction coefficient and the second receipts correction coefficient.

Optionally, described means for correcting also comprises compensator, and described compensator, for a described RRU being carried out to channel compensation according to described the first correction coefficient, carries out channel compensation according to described the second correction coefficient to described the 2nd RRU.

Optionally, described the first antenna and described the second antenna are respectively any one antenna in a described RRU and described the 2nd RRU; Or

Described the first antenna and described the second antenna are respectively an antenna that reaches received signal strength in a described RRU and described the 2nd RRU or signal quality thresholding; Or

Antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, select to reach a pair of antenna of received signal strength or signal quality thresholding; Described mode of carrying out the adjustment of aerial radiation direction comprises following any one mode or its combination in any:

Numerical weighted, intermediate frequency weighting, radio frequency phase shift, physics move.

Optionally, described means for correcting also comprises the first transmitter, and described transmitter, for before obtaining the second penalty coefficient, sends to described the 2nd RRU by described first from correction coefficient; Before obtaining the first penalty coefficient, by described second, receive self-correcting coefficient and send to a described RRU.

Optionally, described self-tuner also carries out self-correcting for the 3rd RRU that described communication system is comprised, and obtains the 3rd self-correcting coefficient;

Described means for correcting also comprises the second transmitter, and described the second transmitter, for after obtaining the first penalty coefficient, sends to described the 3rd RRU by described the first penalty coefficient;

Described processor is also for obtaining the 3rd correction coefficient according to described the first penalty coefficient and the 3rd self-correcting coefficient.

In this specification, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.

Embodiment seven

The present embodiment and embodiment mono-are roughly the same, and difference is:

The executive agent of the present embodiment is

In S301, transmit-receive combination self-correcting coefficient also can be expressed as receives self-correcting coefficient and from the ratio of correction coefficient.

In S302, when selecting antenna, described the first antenna and described the second antenna are respectively any one antenna in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively received signal strength or a best antenna of signal quality in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively an antenna that reaches received signal strength or signal quality thresholding in a described RRU and described the 2nd RRU; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, a pair of antenna that selective reception signal strength signal intensity or signal quality are best; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, select to reach a pair of antenna of received signal strength or signal quality thresholding; Described mode of carrying out the adjustment of aerial radiation direction comprises following any one mode or its combination in any: numerical weighted, intermediate frequency weighting, radio frequency phase shift, physics move.

Correction signal can also be middle various training sequences or the reference signal sequence adopting in Institute of Electrical and Electric Engineers (Institute of Electrical and Electronics Engineers, IEEE) 802 serial protocols.

In S304, obtain after correction coefficient, also to upgrade correction coefficient: in the service channel of RRU0 or RRU1, select one of them service channel as with reference to passage, and the correction coefficient divided by reference channel with the correction coefficient of all service channels of RRU0 and RRU1 respectively, so that all RRU finally snap on some service channels.For example, if select the service channel 0 of RRU0, be reference channel, sending out correction coefficient and receiving correction coefficient and send out correction coefficient and receipts correction coefficient divided by the service channel 0 of RRU0 with RRU0 and all service channel of RRU1.

Obtain after correction coefficient, follow-uply can carry out channel compensation according to correction coefficient.For example, when carrying out regular traffic communication, first correction coefficient and first that can be multiplied by respectively each service channel for RRU0 on the sending and receiving signal of each service channel received correction coefficient, or on the reception signal of each service channel, be multiplied by the first transmit-receive combination correction coefficient of each service channel, or in the transmitted signal of each service channel, be multiplied by the inverse of the first transmit-receive combination correction coefficient of each service channel; Second correction coefficient and second that can be multiplied by respectively each service channel for RRU1 on the sending and receiving signal of each service channel received correction coefficient, or on the reception signal of each service channel, be multiplied by the second transmit-receive combination correction coefficient of each service channel, or in the transmitted signal of each service channel, be multiplied by the inverse of the second transmit-receive combination correction coefficient of each service channel.So can finally complete joint channel between many RRU proofreaies and correct.It should be noted that, if correction coefficient is upgraded, according to the correction coefficient after upgrading, carry out channel compensation.

Embodiment eight

The present embodiment and embodiment bis-are roughly the same, and difference is:

In S502, when selecting antenna, described the first antenna and described the second antenna are respectively any one antenna in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively received signal strength or a best antenna of signal quality in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively an antenna that reaches received signal strength or signal quality thresholding in a described RRU and described the 2nd RRU; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, a pair of antenna that selective reception signal strength signal intensity or signal quality are best; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, select to reach a pair of antenna of received signal strength or signal quality thresholding; Described mode of carrying out the adjustment of aerial radiation direction comprises following any one mode or its combination in any: numerical weighted, intermediate frequency weighting, radio frequency phase shift, physics move.

In S503, before calculating penalty coefficient, by X2 interface or privately owned communication interface between base station system corresponding to RRU0 and base station system corresponding to RRU1, by the service channel 0 drawing during RRU0 self-correcting in S501 first from correction coefficient

send to RRU1, then receive self-correcting coefficient according to second of the service channel 0 drawing during RRU1 self-correcting in S501 n=0,1 ..., N-1, by γ _1,0(n) with

product as the second penalty coefficient μ ₁(n):

${\mathrm{\&mu;}}_1\left(n\right)={\mathrm{\&gamma;}}_{\mathrm{1,0}}\left(n\right){\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{DL}}{\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{UL}}={\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)h_{\mathrm{Air}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right)\&CenterDot;\frac{1}{h_{\mathrm{0,0}}^t\left(n\right)h_0^{\mathrm{cr}}\left(n\right)}\&CenterDot;\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}=\frac{h_{\mathrm{Air}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right)},$

$n=\mathrm{0,1},...,N-1$

Optionally, when RRU1 receives after correction signal, while not carrying out channel estimating:

${\mathrm{\&mu;}}_1\left(n\right)={\mathrm{\&gamma;}}_{\mathrm{1,0}}\left(n\right){\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{DL}}{\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{UL}}={\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)h_{\mathrm{Air}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right)s\left(n\right)\&CenterDot;\frac{1}{h_{\mathrm{0,0}}^t\left(n\right)h_0^{\mathrm{cr}}\left(n\right)}\&CenterDot;\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)}=\frac{h_{\mathrm{Air}}\left(n\right)s\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right)}$

$,n=\mathrm{0,1},...,N-1$

By X2 interface or privately owned communication interface between RRU0 respective base station system and RRU1 respective base station system, by the service channel 0 drawing during RRU1 self-correcting in step 501 second from correction coefficient

n=0,1 ..., N-1 sends to RRU0, then receives self-correcting coefficient according to first of the service channel 0 drawing during RRU0 self-correcting in step 501

n=0,1 ..., N-1, by γ _0,0(n) with

product as the first penalty coefficient μ ₀(n):

${\mathrm{\&mu;}}_0\left(n\right)={\mathrm{\&gamma;}}_{0,0}\left(n\right){\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{UL}}{\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{DL}}=h_{\mathrm{0,0}}^r\left(n\right)h_{\mathrm{Air}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)\&CenterDot;\frac{1}{h_{\mathrm{0,0}}^t\left(n\right)h_0^{\mathrm{ct}}\left(n\right)}\&CenterDot;\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}=\frac{h_{\mathrm{Air}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right)}$

$,n=\mathrm{0,1},...,N-1$

Optionally, when RRU0 receives after correction signal, while not carrying out channel estimating:

${\mathrm{\&mu;}}_0\left(n\right)={\mathrm{\&gamma;}}_{\mathrm{0,0}}\left(n\right){\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{UL}}{\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{DL}}=h_{\mathrm{0,0}}^r\left(n\right)h_{\mathrm{Air}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)s\left(n\right)\&CenterDot;\frac{1}{h_{\mathrm{0,0}}^r\left(n\right)h_0^{\mathrm{ct}}\left(n\right)}\&CenterDot;\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}=\frac{h_{\mathrm{Air}}\left(n\right)s\left(n\right)}{h_0^{\mathrm{ct}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)}$

$,n=\mathrm{0,1},...,N-1$

In S504, obtain after correction coefficient, also to upgrade correction coefficient: in the service channel of RRU0 or RRU1, select one of them service channel as with reference to passage, and the correction coefficient divided by reference channel with the correction coefficient of all service channels of RRU0 and RRU1 respectively, so that all RRU finally snap on some service channels.For example, if select the service channel 0 of RRU0, be reference channel, sending out correction coefficient and receiving correction coefficient and send out correction coefficient and receipts correction coefficient divided by the service channel 0 of RRU0 with RRU0 and all service channel of RRU1.

Obtain after correction coefficient, follow-uply can carry out channel compensation according to correction coefficient.For example, when carrying out regular traffic communication, first correction coefficient and first that can be multiplied by respectively each service channel for RRU0 on the sending and receiving signal of each service channel received correction coefficient, or on the reception signal of each service channel, be multiplied by the first transmit-receive combination correction coefficient of each service channel, or in the transmitted signal of each service channel, be multiplied by the inverse of the first transmit-receive combination correction coefficient of each service channel; Second correction coefficient and second that can be multiplied by respectively each service channel for RRU1 on the sending and receiving signal of each service channel received correction coefficient, or on the reception signal of each service channel, be multiplied by the second transmit-receive combination correction coefficient of each service channel, or in the transmitted signal of each service channel, be multiplied by the inverse of the second transmit-receive combination correction coefficient of each service channel.So can finally complete joint channel between many RRU proofreaies and correct.It should be noted that, if correction coefficient is upgraded, according to the correction coefficient after upgrading, carry out channel compensation.

Embodiment nine

The present embodiment and embodiment tri-are roughly the same, and difference is:

In the present embodiment, when selecting antenna, described the first antenna and described the second antenna are respectively any one antenna in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively received signal strength or a best antenna of signal quality in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively an antenna that reaches received signal strength or signal quality thresholding in a described RRU and described the 2nd RRU; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, a pair of antenna that selective reception signal strength signal intensity or signal quality are best; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, select to reach a pair of antenna of received signal strength or signal quality thresholding; Described mode of carrying out the adjustment of aerial radiation direction comprises following any one mode or its combination in any: numerical weighted, intermediate frequency weighting, radio frequency phase shift, physics move.

In S703, correction signal can also be middle various training sequences or the reference signal sequence adopting in Institute of Electrical and Electric Engineers (Institute of Electrical and Electronics Engineers, IEEE) 802 serial protocols.

In S704, when calculating penalty coefficient: RRU2 has selected the antenna 0 of service channel 0 correspondence as third antenna, therefore according to the 3rd of the service channel 0 drawing during RRU2 self-correcting in step 701 the, receive self-correcting coefficient

n=0,1...., N-1, by γ _2,0(n) with

product as the 3rd penalty coefficient υ ₂(n):

${\mathrm{\&upsi;}}_2\left(n\right)=\frac{h_{\mathrm{Air},\mathrm{0,1}}\left(n\right)h_{\mathrm{Air},\mathrm{1,2}}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_2^{\mathrm{ct}}\left(n\right)},n=\mathrm{0,1}....,N-1$

Optionally, when RRU2 receives after correction signal, while not carrying out channel estimating:

${\mathrm{\&upsi;}}_2\left(n\right)=\frac{h_{\mathrm{Air},\mathrm{0,1}}\left(n\right)h_{\mathrm{Air},12}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_0^{\mathrm{cr}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{cr}}\left(n\right)h_2^{\mathrm{ct}}\left(n\right)}\&CenterDot;s\left(n\right),n=\mathrm{0,1}....,N-1$

Therefore in the present embodiment, RRU1 has selected the antenna 0 of service channel 0 correspondence as the second antenna, receives self-correcting coefficient according to second of the service channel 0 drawing during RRU1 self-correcting in step 701

n=0,1...., N-1, by γ ' _1,0(n) with

product as the second penalty coefficient ' υ ₁(n):

${\mathrm{\&upsi;}}_1\left(n\right)=\frac{h_{\mathrm{Air},12}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_2^{\mathrm{cr}}\left(n\right)},n=\mathrm{0,1}....,N-1$

Optionally, when RRU1 receives after correction signal, while not carrying out channel estimating:

${\mathrm{\&upsi;}}_1\left(n\right)=\frac{h_{\mathrm{Air},12}\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_1^{\mathrm{ct}}\left(n\right)h_2^{\mathrm{cr}}\left(n\right)}\&CenterDot;s\left(n\right),n=\mathrm{0,1}....,N-1$

In S705, the second correction coefficient ' according to the second penalty coefficient ' and the second correction coefficient obtain, the 3rd correction coefficient obtains according to the 3rd penalty coefficient and the 3rd self-correcting coefficient, is about to the second penalty coefficient ' υ ₁(n) product of and the second correction coefficient as second correction coefficient ' by the 3rd penalty coefficient υ ₂(n) the and three product from correction coefficient is as the 3rd correction coefficient

and in the community 1 by RRU1 place by the second penalty coefficient ' υ ₁(n) while sending to community 0, RRU0 place, can send by X2 interface or the privately owned communication interface of minizone.

In the present embodiment, at S705, obtain after correction coefficient, also to upgrade correction coefficient: in the service channel of RRU0, RRU1 or RRU2, select one of them service channel as with reference to passage, and the correction coefficient divided by reference channel with the correction coefficient of all service channels of RRU0, RRU1 and RRU2 respectively, so that all RRU finally snap on some service channels.For example, if select the service channel 0 of RRU0, be reference channel, sending out correction coefficient and receiving correction coefficient and send out correction coefficient and receipts correction coefficient divided by the service channel 0 of RRU0 with RRU0, RRU1 and all service channel of RRU2.

Obtain after correction coefficient, follow-uply can carry out channel compensation according to correction coefficient.For example, when carrying out regular traffic communication, first correction coefficient and first that can be multiplied by respectively respectively its each service channel for RRU0, RRU1, RRU2 on the sending and receiving signal of its each service channel received correction coefficient, or on the reception signal of its each service channel, be multiplied by the first transmit-receive combination correction coefficient of its each service channel, or in the transmitted signal of its each service channel, be multiplied by the inverse of the first transmit-receive combination correction coefficient of its each service channel.So can finally complete joint channel between many RRU proofreaies and correct.It should be noted that, if correction coefficient is upgraded, according to the correction coefficient after upgrading, carry out channel compensation.

Embodiment ten:

The present embodiment and embodiment five are roughly the same, and difference is:

In the present embodiment, when selecting antenna, described the first antenna and described the second antenna are respectively any one antenna in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively received signal strength or a best antenna of signal quality in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively an antenna that reaches received signal strength or signal quality thresholding in a described RRU and described the 2nd RRU; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, a pair of antenna that selective reception signal strength signal intensity or signal quality are best; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, select to reach a pair of antenna of received signal strength or signal quality thresholding; Described mode of carrying out the adjustment of aerial radiation direction comprises following any one mode or its combination in any: numerical weighted, intermediate frequency weighting, radio frequency phase shift, physics move.

In S1005, obtain after correction coefficient, also to upgrade correction coefficient: in the service channel of RRU0, RRU1 or RRU2, select one of them service channel as with reference to passage, and the correction coefficient divided by reference channel with the correction coefficient of all service channels of RRU0, RRU1 and RRU2 respectively, so that all RRU finally snap on some service channels.For example, if select the service channel 0 of RRU0, be reference channel, sending out correction coefficient and receiving correction coefficient and send out correction coefficient and receipts correction coefficient divided by the service channel 0 of RRU0 with RRU0, RRU1 and all service channel of RRU2.

Obtain after correction coefficient, follow-uply can carry out channel compensation according to correction coefficient.For example, when carrying out regular traffic communication, first correction coefficient and first that can be multiplied by respectively respectively its each service channel for RRU0, RRU1 on the sending and receiving signal of its each service channel received correction coefficient, or on the reception signal of its each service channel, be multiplied by the first transmit-receive combination correction coefficient of its each service channel, or in the transmitted signal of its each service channel, be multiplied by the inverse of the first transmit-receive combination correction coefficient of its each service channel.So can finally complete joint channel between many RRU proofreaies and correct.It should be noted that, if correction coefficient is upgraded, according to the correction coefficient after upgrading, carry out channel compensation.

Embodiment 11:

Embodiment 11 proofreaies and correct with joint channel between 2 RRU, and each RRU comprises that again 4 antennas (actual antennas number can be arbitrary integer) describe for example.The method flow schematic diagram that between a kind of many RRU that Figure 12 provides for embodiment six, joint channel is proofreaied and correct, as shown in figure 12, the method comprises:

S1201:RRU0 and RRU1 carry out respectively self-correcting;

In the present embodiment, RRU0 and RRU1 are respectively a RRU and the 2nd RRU, and this step is identical with the S301 in embodiment mono-.

S1202: RRU0 is carried out respectively to relative self-correcting with RRU1;

In the service channel of RRU0 and RRU1, select respectively one of them service channel as with reference to passage, and respectively with the self-correcting coefficient of all service channels of RRU0 and RRU1 divided by the self-correcting coefficient of reference channel separately; For example, if RRU0 has selected its service channel p as with reference to passage, RRU1 has selected service channel q as with reference to passage, the self-correcting coefficient divided by its service channel p with the self-correcting coefficient of all service channels of RRU0, self-correcting coefficient with the self-correcting coefficient of all service channels of RRU1 divided by its service channel q, first after upgrading received self-correcting coefficient and is:

${\mathrm{\&beta;}}_{0,p}^{\mathrm{UL}}\left(n\right)=1;$ After renewal first from correction coefficient is: ${\mathrm{\&beta;}}_{0,i}^{\mathrm{DL}}\left(n\right)=\frac{{\mathrm{\&beta;}}_{0,i}^{\mathrm{DL}}\left(n\right)}{{\mathrm{\&beta;}}_{0,q}^{\mathrm{DL}}\left(n\right)}=\frac{h_{0,p}^t\left(n\right)}{h_{0,i}^t\left(n\right)},k=\mathrm{0,1},$ ${\mathrm{\&beta;}}_{0,p}^{\mathrm{DL}}\left(n\right)=1;$ The first transmit-receive combination self-correcting coefficient after renewal is: ${\mathrm{\&beta;}}_{0,i}\left(n\right)=\frac{{\mathrm{\&beta;}}_{0,i}\left(n\right)}{{\mathrm{\&beta;}}_{0,p}\left(n\right)},{\mathrm{\&beta;}}_{0,p}\left(n\right)=1;$ Self-correcting coefficient is received in after renewal second: ${\mathrm{\&beta;}}_{1,i}^{\mathrm{UL}}\left(n\right)=\frac{{\mathrm{\&beta;}}_{1,i}^{\mathrm{UL}}\left(n\right)}{{\mathrm{\&beta;}}_{1,q}^{\mathrm{UL}}\left(n\right)}=\frac{h_{1,q}^r\left(n\right)}{h_{1,i}^r\left(n\right)},k=\mathrm{0,1},$ ${\mathrm{\&beta;}}_{1,q}^{\mathrm{UL}}\left(n\right)=1;$ After renewal second from correction coefficient is: ${\mathrm{\&beta;}}_{1,i}^{\mathrm{DL}}\left(n\right)=\frac{{\mathrm{\&beta;}}_{1,i}^{\mathrm{DL}}\left(n\right)}{{\mathrm{\&beta;}}_{1,q}^{\mathrm{DL}}\left(n\right)}=\frac{h_{1,q}^t\left(n\right)}{h_{1,i}^t\left(n\right)},k=\mathrm{0,1},$ ${\mathrm{\&beta;}}_{1,q}^{\mathrm{DL}}\left(n\right)=1;$ The second transmit-receive combination self-correcting coefficient after renewal is:

RRU0 completes after self-correcting and can represent with formula below:

$\frac{{\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,0}}^r\left(n\right)}{{\mathrm{\&beta;}}_{\mathrm{0,0}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,0}}^t\left(n\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{0,1}}^{\mathrm{UL}}\left(n\right)h_{\mathrm{0,1}}^r\left(n\right)}{{\mathrm{\&beta;}}_{\mathrm{0,1}}^{\mathrm{DL}}\left(n\right)h_{\mathrm{0,1}}^t\left(n\right)}=...=\frac{{\mathrm{\&beta;}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\mathrm{\&beta;}}_{0,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right)h_{0,N_{\mathrm{ANT}}-1}^t\left(n\right)}=\frac{h_{0,p}^r\left(n\right)}{h_{0,p}^t\left(n\right)}$

RRU1 completes after self-correcting and can represent with formula below:

$\frac{{\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)}{{\mathrm{\&beta;}}_{\mathrm{1,0}}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right)}=\frac{{\mathrm{\&beta;}}_{\mathrm{1,1}}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}^r\left(n\right)}{{\mathrm{\&beta;}}_{\mathrm{1,1}}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}^t\left(n\right)}=...=\frac{{\mathrm{\&beta;}}_{1,N_{\mathrm{ANT}}-1}^{\mathrm{UL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^r\left(n\right)}{{\mathrm{\&beta;}}_{1,N_{\mathrm{ANT}}-1}^{\mathrm{DL}}\left(n\right){\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,N_{\mathrm{ANT}}-1}^t\left(n\right)}=\frac{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,q}^r\left(n\right)}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{1,q}^t\left(n\right)}$

S1203: in RRU0, the antenna p that service channel p is corresponding launches the first correction signal, in RRU1, service channel q respective antenna q receives described the first correction signal; By the antenna q in RRU1, launch the second correction signal, the antenna p in RRU0 receives described the second correction signal;

Take p=q=0 as example, and the correction signal of transmitting is:

n=0,1 ..., N-1.

The first correction signal that n subcarrier of the antenna 0 of RRU1 receives is:

${\tilde{r}}_{\mathrm{1,0}}\left(n\right)={\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air},10}\left(n\right)\&CenterDot;h_{\mathrm{0,0}}^t\left(n\right)\&CenterDot;s\left(n\right),n=\mathrm{0,1},...,N-1$

RRU1 receives after the first correction signal, by reference sequences S, carries out channel estimating, and the second channel response that the individual sub-carrier estimation of n goes out is:

${\mathrm{\&gamma;}}_{\mathrm{1,0}}\left(n\right)={\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air},10}\left(n\right)\&CenterDot;h_{\mathrm{0,0}}^t\left(n\right),n=\mathrm{0,1},...,N-1$

In like manner, RRU0 receives after the second correction signal, by reference sequences S, carries out channel estimating, and the first channel response that the individual sub-carrier estimation of n goes out is:

${\mathrm{\&gamma;}}_{\mathrm{0,0}}\left(n\right)=h_{\mathrm{0,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air},01}\left(n\right)\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right),n=\mathrm{0,1},...,N-1$

S1204: obtain the first penalty coefficient and the second penalty coefficient according to described the first channel response and second channel response.Penalty coefficient obtains correction coefficient after being used for revising self-correcting coefficient, makes the ratio of different RRUs up-downgoing identical;

The second penalty coefficient is:

${\mathrm{\&mu;}}_1\left(n\right)={\mathrm{\&gamma;}}_{\mathrm{1,0}}\left(n\right)={\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air},10}\left(n\right)\&CenterDot;h_{\mathrm{0,0}}^t\left(n\right),n=\mathrm{0,1},...,N-1$

The first penalty coefficient is:

${\mathrm{\&mu;}}_0\left(n\right)={\mathrm{\&gamma;}}_{\mathrm{0,0}}\left(n\right)=h_{\mathrm{0,0}}^r\left(n\right)\&CenterDot;h_{\mathrm{Air},01}\left(n\right)\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA00002517645300011.png,HDA00002517645300021.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,0}}^t\left(n\right),n=\mathrm{0,1},...,N-1$

S1205: take RRU0 as reference, penalty coefficient between the RRU of acquisition RRU1, after the renewal of RRU1 second receipts self-correcting correction coefficient is multiplied by penalty coefficient between RRU, obtain second and receive correction coefficient, second correction coefficient after renewal equals second from correction coefficient, or the penalty coefficient between correction coefficient is divided by RRU of second after the renewal of RRU1, obtain second correction coefficient, after renewal second received correction coefficient and equaled the second receipts self-correcting coefficient, or the second transmit-receive combination self-correcting correction coefficient after the renewal of RRU1 is multiplied by penalty coefficient between RRU, obtain the second transmit-receive combination correction coefficient, the first correction coefficient of RRU0 or the first transmit-receive combination correction coefficient with upgrade after the first self-correcting coefficient or upgrade after the first transmit-receive combination self-correcting coefficient equate.

Take RRU0 as reference, and between RRU, penalty coefficient is:

$\mathrm{\&mu;}\left(n\right)=\frac{{\mathrm{\&mu;}}_0\left(n\right)}{{\mathrm{\&mu;}}_1\left(n\right)}$

Due to μ ₀(n) at BBU corresponding to RRU0, need to be transferred to the BBU that RRU1 is corresponding as LTE system X2 interface by privately owned communication interface or standard protocol interface, in order to reduce transport overhead, can consider interactive channel estimated value γ _0,0(n) (μ ₀(n)=γ _0,0(n) time domain tap information), or on frequency domain, take to take out every N 1 mode (N > 1), reduce transport overhead to 1/N.

Obtain after correction coefficient, follow-uply can carry out channel compensation according to correction coefficient.For example, when carrying out regular traffic communication, first correction coefficient and first that can be multiplied by respectively respectively its each service channel for RRU0, RRU1 on the sending and receiving signal of its each service channel received correction coefficient, or on the reception signal of its each service channel, be multiplied by the first transmit-receive combination correction coefficient of its each service channel, or in the transmitted signal of its each service channel, be multiplied by the inverse of the first transmit-receive combination correction coefficient of its each service channel.So can finally complete joint channel between many RRU proofreaies and correct.It should be noted that, if correction coefficient is upgraded, according to the correction coefficient after upgrading, carry out channel compensation.

This scheme expands to k RRU, k >=3 o'clock, other RRU all with reference to RRU, for example RRU0 carries out correction between any two, as supposes 3 RRU, RRU0, RRU1 and RRU2, RRU0 and RRU1 adopt the correction coefficient of the RRU1 of embodiment similar operations acquisition above, and RRU0 and RRU2 also adopt the correction coefficient of the RRU2 of embodiment similar operations acquisition above, by that analogy.

Embodiment 12:

As shown in figure 11, the present embodiment provides a kind of means for correcting, and this means for correcting can be for carrying out joint channel bearing calibration between the RRU of above-described embodiment one, take that RRU0 and RRU1 are respectively a RRU and the 2nd RRU is example, and this means for correcting comprises:

Self-tuner, for a described RRU and described the 2nd RRU are carried out respectively to self-correcting, and obtains respectively the first self-correcting coefficient and the second self-correcting coefficient; Described the first self-correcting coefficient and described the second self-correcting coefficient are sent to processor

The first controller, for second antenna transmission the first correction signal in the 2nd RRU described in the first day alignment by a described RRU, and by the first correction signal described in described the second antenna reception;

Second controller, by first antenna transmission the second correction signal described in described second day alignment, and by the second correction signal described in described the first antenna reception;

Processor, for after the first correction signal described in described the second antenna reception, obtains the second penalty coefficient according to the channel response that receives described the first correction signal generation; After the second correction signal described in described the first antenna reception, according to the channel response that receives described the second correction signal generation, obtain the first penalty coefficient; And obtain the first correction coefficient according to described the first penalty coefficient and the first self-correcting coefficient, according to described the second penalty coefficient and the second self-correcting coefficient, obtain the second correction coefficient; Described the first correction coefficient and described the second correction coefficient are sent to compensator;

Optionally, described means for correcting also comprises compensator, for a described RRU being carried out to channel compensation according to described the first correction coefficient, according to described the second correction coefficient, described the 2nd RRU is carried out to channel compensation.

Optionally, described the first self-correcting coefficient comprises that first of each service channel in a described RRU receives self-correcting coefficient from correction coefficient and first, and described the second self-correcting coefficient comprises that second of each service channel in described the 2nd RRU receives self-correcting coefficient from correction coefficient and second; The first correction coefficient comprises that first correction coefficient and first of each service channel in a described RRU receive correction coefficient, and the second correction coefficient comprises that second correction coefficient and second of each service channel in described the 2nd RRU receive correction coefficient.

Optionally, when selecting antenna, described the first antenna and described the second antenna are respectively any one antenna in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively received signal strength or a best antenna of signal quality in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively an antenna that reaches received signal strength or signal quality thresholding in a described RRU and described the 2nd RRU; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, a pair of antenna that selective reception signal strength signal intensity or signal quality are best; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, select to reach a pair of antenna of received signal strength or signal quality thresholding; Described mode of carrying out the adjustment of aerial radiation direction comprises following any one mode or its combination in any: numerical weighted, intermediate frequency weighting, radio frequency phase shift, physics move.

Optionally, described means for correcting also comprises the first transmitter, and described transmitter for sending to described the 2nd RRU by first of service channel corresponding to described the first antenna from correction coefficient before obtaining the second penalty coefficient; Also for sent to a described RRU by second of service channel corresponding to described the second antenna from correction coefficient before obtaining the first penalty coefficient.

Optionally, described communication system also comprises the 3rd RRU, and described self-tuner also carries out self-correcting for the 3rd RRU that described communication system is comprised, and obtains the 3rd self-correcting coefficient; Described second controller also for the third antenna in the 3rd RRU described in the second day alignment by described the 2nd RRU launch the second correction signal ', and by described third antenna receive described the second correction signal '; Described means for correcting also comprises the 3rd controller, for the third antenna by described the 3rd RRU to the second antenna transmission the 3rd correction signal in described the 2nd RRU, and by the 3rd correction signal described in described the second antenna reception; Described means for correcting also comprises the second transmitter, and described the second transmitter is for by the described RRU of described the second penalty coefficient ' send to; Described processor is also for obtaining the 3rd penalty coefficient according to the 3rd channel response that receives described the second correction signal ' obtain; According to receive second channel that described the 3rd correction signal obtains respond ' obtain the second penalty coefficient '; According to described the second penalty coefficient ' and the first correction coefficient obtain the first correction coefficient '; According to described the second penalty coefficient ' and described the second correction coefficient obtain the second correction coefficient ', according to the 3rd penalty coefficient and the 3rd self-correcting coefficient, obtain the 3rd correction coefficient.Now this means for correcting can be for joint channel bearing calibration between the RRU of execution above-described embodiment three or embodiment tetra-.

Optionally, processor in described means for correcting is also for selecting one of them service channel as with reference to passage at the service channel of a described RRU or described the 2nd RRU, and the correction coefficient divided by described reference channel with the correction coefficient of all service channels of a described RRU and described the 2nd RRU respectively, so that all RRU snap to described reference channel.

Embodiment 13:

As shown in figure 13, embodiment eight provides a kind of means for correcting, and this means for correcting can be for carrying out joint channel bearing calibration between the RRU of above-described embodiment one, take that RRU0 and RRU1 are respectively a RRU and the 2nd RRU is example, and this means for correcting comprises:

Self-tuner, for a described RRU and described the 2nd RRU are carried out respectively to self-correcting, and obtains respectively the first self-correcting coefficient of all service channels of a described RRU and the second self-correcting coefficient of all service channels of described the 2nd RRU; Described the first self-correcting coefficient and described the second self-correcting coefficient are sent to processor;

First processor, for selecting one of them service channel as with reference to passage at the service channel of a described RRU and described the 2nd RRU respectively, and respectively with the self-correcting coefficient of all service channels of a described RRU and described the 2nd RRU divided by the self-correcting coefficient of reference channel separately, so that a described RRU and described the 2nd RRU snap to respectively reference channel separately; Obtain the first self-correcting coefficient and the second self-correcting coefficient after renewal;

The first controller, for by second antenna transmission the first correction signal corresponding to reference channel in the 2nd RRU described in first day alignment corresponding to a described RRU reference channel, and by the first correction signal described in described the second antenna reception;

Second controller, for by first antenna transmission the second correction signal described in described second day alignment, and by the second correction signal described in described the first antenna reception;

Transmitter, for sending to described the first penalty coefficient described the 2nd RRU;

The second processor, obtains the second penalty coefficient for the second channel response obtaining according to described the first correction signal of reception; The first channel response obtaining according to described the second correction signal of reception obtains the first penalty coefficient; According to the ratio of described the first penalty coefficient and described the second penalty coefficient, obtain penalty coefficient between RRU; According to the second self-correcting coefficient after penalty coefficient between described RRU and all service channels renewals of described the 2nd RRU, obtain the second correction coefficient of all service channels of described the 2nd RRU, and the first self-correcting coefficient after all service channels of a described RRU upgrade is as the first correction coefficient of all service channels of a described RRU.

Optionally, described the first self-correcting coefficient comprises that first of each service channel in a described RRU receives self-correcting coefficient from correction coefficient and first, and described the second self-correcting coefficient comprises that second of each service channel in described the 2nd RRU receives self-correcting coefficient from correction coefficient and second; The first correction coefficient comprises that first correction coefficient and first of each service channel in a described RRU receive correction coefficient, and the second correction coefficient comprises that second correction coefficient and second of each service channel in described the 2nd RRU receive correction coefficient.

Optionally, described means for correcting also comprises compensator, for a described RRU being carried out to channel compensation according to described the first correction coefficient, according to described the second correction coefficient, described the 2nd RRU is carried out to channel compensation.

The software module that the method for describing in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to carry out, or the combination of the two is implemented.Software module can be placed in the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.

Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (27)

1. the method that between a plurality of radio frequency remote unit RRU, joint channel is proofreaied and correct, proofreaies and correct for the joint channel between a plurality of RRU of communication system, at least comprises a RRU and the 2nd RRU in described communication system, it is characterized in that, described method comprises:

A described RRU and described the 2nd RRU are carried out respectively to self-correcting, and obtain respectively the first self-correcting coefficient and the second self-correcting coefficient;

By second antenna transmission the first correction signal in the 2nd RRU described in the first day alignment in a described RRU, and by the first correction signal described in described the second antenna reception, the second penalty coefficient is obtained in the second channel response obtaining according to described the first correction signal of reception;

By first antenna transmission the second correction signal described in described second day alignment, and by the second correction signal described in described the first antenna reception, the first channel response obtaining according to described the second correction signal of reception obtains the first penalty coefficient;

According to described the first penalty coefficient and the first self-correcting coefficient, obtain the first correction coefficient, according to described the second penalty coefficient and the second self-correcting coefficient, obtain the second correction coefficient;

According to described the first correction coefficient, a described RRU is carried out to channel compensation, according to described the second correction coefficient, described the 2nd RRU is carried out to channel compensation.

2. method according to claim 1, is characterized in that, described the first antenna and described the second antenna are respectively any one antenna in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively received signal strength or a best antenna of signal quality in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively an antenna that reaches received signal strength or signal quality thresholding in a described RRU and described the 2nd RRU; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, a pair of antenna that selective reception signal strength signal intensity or signal quality are best; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, select to reach a pair of antenna of received signal strength or signal quality thresholding; Described mode of carrying out the adjustment of aerial radiation direction comprises following any one mode or its combination in any: numerical weighted, intermediate frequency weighting, radio frequency phase shift, physics move.

3. method according to claim 1, it is characterized in that, described the first self-correcting coefficient comprises that first of each service channel in a described RRU receives self-correcting coefficient from correction coefficient and first, and described the second self-correcting coefficient comprises that second of each service channel in described the 2nd RRU receives self-correcting coefficient from correction coefficient and second; The first correction coefficient comprises that first correction coefficient and first of each service channel in a described RRU receive correction coefficient, and the second correction coefficient comprises that second correction coefficient and second of each service channel in described the 2nd RRU receive correction coefficient.

4. method according to claim 3, is characterized in that, described the first correction signal is the first product from correction coefficient of the service channel that calibration reference sequence and described the first antenna are corresponding; Described the second correction signal is the second product from correction coefficient of the service channel that described calibration reference sequence and described the second antenna are corresponding.

5. method according to claim 3, is characterized in that, described the first correction signal and the second correction signal are calibration reference sequence; Described obtain the second penalty coefficient before, also comprise the steps:

By first of service channel corresponding to described the first antenna, from correction coefficient, send to described the 2nd RRU;

Described obtain the first penalty coefficient before, also comprise the steps:

By second of service channel corresponding to described the second antenna, from correction coefficient, send to a described RRU.

6. according to the method described in claim 4 or 5, it is characterized in that, described calibration reference sequence comprises training sequence or the reference signal sequence using in Long Term Evolution LTE system, worldwide interoperability for microwave access WiMAX system or Institute of Electrical and Electric Engineers IEEE802 serial protocols.

7. method according to claim 4, is characterized in that, described in obtain the second penalty coefficient and comprise: using the product of the second receipts self-correcting coefficient of described second channel response and service channel corresponding to described the second antenna as the second penalty coefficient;

Described first penalty coefficient that obtains comprises: using the first product of receiving self-correcting coefficient of described the first channel response and service channel corresponding to described the first antenna as the first penalty coefficient.

8. method according to claim 5, it is characterized in that, described in obtain the second penalty coefficient and comprise: using first the second product of receiving self-correcting coefficient from correction coefficient, service channel that described the second antenna is corresponding of described second channel response, service channel that described the first antenna is corresponding as the second penalty coefficient;

Described first penalty coefficient that obtains comprises: using second the first product of receiving self-correcting coefficient from correction coefficient, service channel that described the first antenna is corresponding of described the first channel response, service channel that described the second antenna is corresponding as the first penalty coefficient.

9. according to the method described in claim 3-8 any one, it is characterized in that, describedly according to described the first penalty coefficient and the first self-correcting coefficient, obtain the first correction coefficient, be specially:

Using first correction coefficient of the first product from correction coefficient each service channel in a described RRU of each service channel in described the first penalty coefficient and a described RRU; Or using the first receipts correction coefficient of the ratio of the first receipts self-correcting coefficient of each service channel in a described RRU and described the first penalty coefficient each service channel in a described RRU; Or the first transmit-receive combination correction coefficient of each service channel in a described RRU using the first transmit-receive combination self-correcting coefficient of each service channel in a described RRU and the ratio of described the first penalty coefficient;

Describedly according to described the second penalty coefficient and the second self-correcting coefficient, obtain the second correction coefficient, be specially:

Using second correction coefficient of the second product from correction coefficient each service channel in described the 2nd RRU of each service channel in described the second penalty coefficient and described the 2nd RRU; Or using the second receipts correction coefficient of the ratio of the second receipts self-correcting coefficient of each service channel in described the 2nd RRU and described the second penalty coefficient each service channel in described the 2nd RRU; Or the second transmit-receive combination correction coefficient of each service channel in described the 2nd RRU using the second transmit-receive combination self-correcting coefficient of each service channel in described the 2nd RRU and the ratio of described the second penalty coefficient;

Described transmit-receive combination self-correcting coefficient is for receiving self-correcting coefficient and from the ratio of correction coefficient.

10. according to the method described in claim 1-9 any one, it is characterized in that, after obtaining correction coefficient, also comprise the steps:

In the service channel of a described RRU or described the 2nd RRU, select one of them service channel as with reference to passage, and the correction coefficient divided by described reference channel with the correction coefficient of all service channels of a described RRU and described the 2nd RRU respectively, so that a described RRU and described the 2nd RRU snap to described reference channel;

According to the correction coefficient after alignment, a described RRU and described the 2nd RRU are carried out to channel compensation.

11. methods according to claim 1, is characterized in that, described communication system also comprises the 3rd RRU, after the method, also comprise the steps:

Described the 3rd RRU is carried out to self-correcting, and obtain the 3rd self-correcting coefficient;

By the third antenna in the 3rd RRU described in the second day alignment in described the 2nd RRU launch the second correction signal ', and by described third antenna receive described the second correction signal ', according to the channel response that receives described the second correction signal ' obtain, obtain the 3rd penalty coefficient;

By the third antenna in described the 3rd RRU to the second antenna transmission the 3rd correction signal in described the 2nd RRU, and by the 3rd correction signal described in described the second antenna reception, according to receive channel response that described the 3rd correction signal obtains obtain the second penalty coefficient ';

According to described the second penalty coefficient ' and described the second correction coefficient obtain the second correction coefficient ', according to the 3rd penalty coefficient and the 3rd self-correcting coefficient, obtain the 3rd correction coefficient;

According to described the second correction coefficient ' described the 2nd RRU is carried out to channel compensation, according to described the 3rd correction coefficient, described the 3rd RRU is carried out to channel compensation.

12. methods according to claim 11, is characterized in that, after the method, also comprise the steps:

By the described RRU of described the second penalty coefficient ' send to, and according to described the second penalty coefficient ' and the first correction coefficient obtain the first correction coefficient '; And according to described a first correction coefficient ' described RRU is carried out to channel compensation.

13. methods according to claim 12, is characterized in that, after the method, also comprise the steps:

In the service channel of a described RRU, described the 2nd RRU or described the 3rd RRU, select one of them service channel as with reference to passage, and the correction coefficient divided by described reference channel with the correction coefficient of all service channels of a described RRU, described the 2nd RRU and described the 3rd RRU respectively, so that a described RRU, described the 2nd RRU and described the 3rd RRU snap to described reference channel;

According to the correction coefficient after alignment, a described RRU, described the 2nd RRU and described the 3rd RRU are carried out to channel compensation.

The method that between 14. 1 kinds of a plurality of RRU, joint channel is proofreaied and correct, proofreaies and correct for the joint channel between a plurality of RRU of communication system, at least comprises a RRU and the 2nd RRU in described communication system, it is characterized in that, described method comprises:

A described RRU and described the 2nd RRU are carried out respectively to self-correcting, and obtain respectively the first self-correcting coefficient of all service channels of a described RRU and the second self-correcting coefficient of all service channels of described the 2nd RRU;

In the service channel of a described RRU and described the 2nd RRU, select respectively one of them service channel as with reference to passage, and respectively with the self-correcting coefficient of all service channels of a described RRU and described the 2nd RRU divided by the self-correcting coefficient of reference channel separately, obtain the second self-correcting coefficient after the first self-correcting coefficient after all service channels of a described RRU upgrade and all service channels of described the 2nd RRU upgrade;

By second antenna transmission the first correction signal corresponding to reference channel in the 2nd RRU described in the first day alignment that in a described RRU, reference channel is corresponding, and by the first correction signal described in described the second antenna reception, the second penalty coefficient is obtained in the second channel response obtaining according to described the first correction signal of reception;

By first antenna transmission the second correction signal described in described second day alignment, and by the second correction signal described in described the first antenna reception, the first channel response obtaining according to described the second correction signal of reception obtains the first penalty coefficient, and described the first penalty coefficient is sent to described the 2nd RRU, so that described the 2nd RRU obtains penalty coefficient between RRU, between described RRU, penalty coefficient is the ratio of described the first penalty coefficient and described the second penalty coefficient;

According to the second self-correcting coefficient after penalty coefficient between described RRU and all service channels renewals of described the 2nd RRU, obtain the second correction coefficient of all service channels of described the 2nd RRU, and the first self-correcting coefficient after all service channels of a described RRU upgrade is as the first correction coefficient of all service channels of a described RRU;

According to described the first correction coefficient, a described RRU is carried out to channel compensation, according to described the second correction coefficient, described the 2nd RRU is carried out to channel compensation.

15. methods according to claim 14, it is characterized in that, described the first self-correcting coefficient comprises first the first receipts self-correcting coefficient from correction coefficient and all service channels of a described RRU of all service channels of a described RRU, and the second self-correcting coefficient comprises second the second receipts self-correcting coefficient from correction coefficient and all service channels of described the 2nd RRU of all service channels of described the 2nd RRU; The first correction coefficient comprises first correction coefficient of all service channels of a described RRU and the first receipts correction coefficient of all service channels of a described RRU, and the second correction coefficient comprises second correction coefficient of all service channels of described the 2nd RRU and the second receipts correction coefficient of all service channels of described the 2nd RRU.

16. methods according to claim 14, is characterized in that, described the first correction signal and the second correction signal are calibration reference sequence.

17. methods according to claim 16, it is characterized in that, described calibration reference sequence comprises training sequence or the reference signal sequence using in Long Term Evolution LTE system, worldwide interoperability for microwave access WiMAX system or Institute of Electrical and Electric Engineers IEEE802 serial protocols.

18. methods according to claim 14, is characterized in that, described in obtain the second penalty coefficient and comprise: using described second channel response as the second penalty coefficient;

Described first penalty coefficient that obtains comprises: using described the first channel response as the first penalty coefficient.

19. methods according to claim 15, is characterized in that, according to the second self-correcting coefficient after penalty coefficient between described RRU and all service channels renewals of described the 2nd RRU, obtain the second correction coefficient, are specially:

The second product of receiving self-correcting coefficient using between described RRU after penalty coefficient and all service channels renewals of described the 2nd RRU is received correction coefficient as second of all service channels of described the 2nd RRU; Or second correction coefficient using the ratio of the penalty coefficient between correction coefficient and described RRU of second after all service channels renewals of described the 2nd RRU as all service channels of described the 2nd RRU; Or between the second transmit-receive combination self-correcting coefficient after all service channels of described the 2nd RRU upgrade and described RRU, the product of penalty coefficient is as the second transmit-receive combination correction coefficient of all service channels of described the 2nd RRU;

The ratio from correction coefficient of transmit-receive combination self-correcting coefficient after described renewal for the receipts self-correcting coefficient after upgrading and after upgrading.

20. 1 kinds of means for correctings, proofread and correct for the joint channel between a plurality of RRU of communication system, at least comprise a RRU and the 2nd RRU in described communication system, it is characterized in that, described means for correcting comprises:

Self-tuner, for a described RRU and described the 2nd RRU are carried out respectively to self-correcting, and obtains respectively the first self-correcting coefficient and the second self-correcting coefficient; Described the first self-correcting coefficient and described the second self-correcting coefficient are sent to processor;

The first controller, for second antenna transmission the first correction signal in the 2nd RRU described in the first day alignment by a described RRU, and by the first correction signal described in described the second antenna reception;

Second controller, for by first antenna transmission the second correction signal described in described second day alignment, and by the second correction signal described in described the first antenna reception;

Processor, obtains the second penalty coefficient for the second channel response obtaining according to described the first correction signal of reception; The first channel response obtaining according to described the second correction signal of reception obtains the first penalty coefficient; And obtain the first correction coefficient according to described the first penalty coefficient and the first self-correcting coefficient, according to described the second penalty coefficient and the second self-correcting coefficient, obtain the second correction coefficient.

21. means for correctings according to claim 20, it is characterized in that, described means for correcting also comprises compensator, for a described RRU being carried out to channel compensation according to described the first correction coefficient, according to described the second correction coefficient, described the 2nd RRU is carried out to channel compensation.

22. means for correctings according to claim 20, is characterized in that, described the first antenna and described the second antenna are respectively any one antenna in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively received signal strength or a best antenna of signal quality in a described RRU and described the 2nd RRU; Or described the first antenna and described the second antenna are respectively an antenna that reaches received signal strength or signal quality thresholding in a described RRU and described the 2nd RRU; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, a pair of antenna that selective reception signal strength signal intensity or signal quality are best; Or antenna in a described RRU and the 2nd RRU is carried out to the adjustment of aerial radiation direction, select to reach a pair of antenna of received signal strength or signal quality thresholding; Described mode of carrying out the adjustment of aerial radiation direction comprises following any one mode or its combination in any: numerical weighted, intermediate frequency weighting, radio frequency phase shift, physics move.

23. means for correctings according to claim 20, it is characterized in that, described means for correcting also comprises the first transmitter, and described the first transmitter for sending to described the 2nd RRU by first of service channel corresponding to described the first antenna from correction coefficient before obtaining the second penalty coefficient; Also for sent to a described RRU by second of service channel corresponding to described the second antenna from correction coefficient before obtaining the first penalty coefficient.

24. means for correctings according to claim 20, is characterized in that, described communication system also comprises the 3rd RRU, and described self-tuner also carries out self-correcting for the 3rd RRU that described communication system is comprised, and obtain the 3rd self-correcting coefficient;

Described second controller also for the third antenna in the 3rd RRU described in the second day alignment by described the 2nd RRU launch the second correction signal ', and by described third antenna receive described the second correction signal ';

Described means for correcting also comprises the 3rd controller, for the third antenna by described the 3rd RRU to the second antenna transmission the 3rd correction signal in described the 2nd RRU, and by the 3rd correction signal described in described the second antenna reception;

Described means for correcting also comprises the second transmitter, and described the second transmitter is for by the described RRU of described the second penalty coefficient ' send to;

Described processor is also for obtaining the 3rd penalty coefficient according to the 3rd channel response that receives described the second correction signal ' obtain; According to receive second channel that described the 3rd correction signal obtains respond ' obtain the second penalty coefficient '; According to described the second penalty coefficient ' and the first correction coefficient obtain the first correction coefficient '; According to described the second penalty coefficient ' and described the second correction coefficient obtain the second correction coefficient ', according to the 3rd penalty coefficient and the 3rd self-correcting coefficient, obtain the 3rd correction coefficient.

25. means for correctings according to claim 20, it is characterized in that, described processor is also for selecting one of them service channel as with reference to passage at the service channel of a described RRU or described the 2nd RRU, and the correction coefficient divided by described reference channel with the correction coefficient of all service channels of a described RRU and described the 2nd RRU respectively, so that a described RRU and described the 2nd RRU snap to described reference channel.

26. 1 kinds of means for correctings, proofread and correct for the joint channel between a plurality of RRU of communication system, at least comprise a RRU and the 2nd RRU in described communication system, it is characterized in that, described means for correcting comprises:

Self-tuner, for a described RRU and described the 2nd RRU are carried out respectively to self-correcting, and obtains respectively the first self-correcting coefficient of all service channels of a described RRU and the second self-correcting coefficient of all service channels of described the 2nd RRU; Described the first self-correcting coefficient and described the second self-correcting coefficient are sent to processor;

First processor, for selecting one of them service channel as with reference to passage at the service channel of a described RRU and described the 2nd RRU respectively, and respectively with the self-correcting coefficient of all service channels of a described RRU and described the 2nd RRU divided by the self-correcting coefficient of reference channel separately, so that a described RRU and described the 2nd RRU snap to respectively reference channel separately; Obtain the first self-correcting coefficient and the second self-correcting coefficient after renewal;

The first controller, for by second antenna transmission the first correction signal corresponding to reference channel in the 2nd RRU described in first day alignment corresponding to a described RRU reference channel, and by the first correction signal described in described the second antenna reception;

Second controller, for by first antenna transmission the second correction signal described in described second day alignment, and by the second correction signal described in described the first antenna reception;

Transmitter, for sending to described the first penalty coefficient described the 2nd RRU;

The second processor, obtains the second penalty coefficient for the second channel response obtaining according to described the first correction signal of reception; The first channel response obtaining according to described the second correction signal of reception obtains the first penalty coefficient; According to the ratio of described the first penalty coefficient and described the second penalty coefficient, obtain penalty coefficient between RRU; According to the second self-correcting coefficient after penalty coefficient between described RRU and all service channels renewals of described the 2nd RRU, obtain the second correction coefficient of all service channels of described the 2nd RRU, and the first self-correcting coefficient after all service channels of a described RRU upgrade is as the first correction coefficient of all service channels of a described RRU.

27. means for correctings according to claim 26, it is characterized in that, described means for correcting also comprises compensator, for a described RRU being carried out to channel compensation according to described the first correction coefficient, according to described the second correction coefficient, described the 2nd RRU is carried out to channel compensation.

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